山下 正廣

J-GLOBALへ         更新日: 18/12/27 13:12
 
アバター
研究者氏名
山下 正廣
 
ヤマシタ マサヒロ
eメール
yamasitaagnus.chem.tohoku.ac.jp
URL
http://db.tohoku.ac.jp/whois/detail/ab1792829052dc2834565d17a9114798.html
所属
東北大学
部署
材料科学高等研究所 ソフトマテリアル
職名
教授
学位
理学博士(化学専攻)(九州大学)
その他の所属
東北大学

研究分野

 
 

経歴

 
1989年9月
 - 
2000年9月
ロンドン大学 客員研究員(1989-1990)
 

学歴

 
 
 - 
1982年3月
九州大学 理学研究科 化学専攻
 
 
 - 
1977年3月
九州大学 理学部 化学科
 

委員歴

 
2008年10月
 - 
現在
日本学術会議  連携会員
 
2008年10月
 - 
現在
日本化学会  活性化委員会委員
 
2008年7月
 - 
現在
分子科学研究所  人事委員会委員
 
2008年7月
 - 
現在
分子科学研究所  運営協議会委員
 
2007年10月
 - 
現在
錯体化学会  将来計画委員会委員長
 

受賞

 
2005年3月
日本化学会 日本化学会学術賞 強相関電子系ナノワイヤー金属錯体の創製と物性
 

論文

 
Priyanka Pandey, Nidhi Dwivedi, Goulven Cosquer, Goulven Cosquer, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Sailaja Sunkari
ChemistrySelect   3 10311-10319   2018年10月
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Tetradentate Schiff base ligands with multiple coordinaton sites are one of the best choice for the construction of multinuclear metal complexes. Coupled with auxiliary ligands under self assembl...
Tsutomu Yamabayashi, Matteo Atzori, Lorenzo Tesi, Goulven Cosquer, Fabio Santanni, Marie Emmanuelle Boulon, Elena Morra, Stefano Benci, Renato Torre, Renato Torre, Mario Chiesa, Lorenzo Sorace, Roberta Sessoli, Roberta Sessoli, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Journal of the American Chemical Society   140 12090-12101   2018年9月
© 2018 American Chemical Society. Practical implementation of highly coherent molecular spin qubits for challenging technological applications, such as quantum information processing or quantum sensing, requires precise organization of electronic ...
Ryo Nakanishi, Jyunya Satoh, Keiichi Katoh, Haitao Zhang, Brian K. Breedlove, Masahiko Nishijima, Yusuke Nakanishi, Haruka Omachi, Hisanori Shinohara, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Journal of the American Chemical Society   140 10955-10959   2018年9月
© Copyright 2018 American Chemical Society. DySc2N@C80 is an endohedral metallofullerene showing single-molecule magnet (SMM) behavior. In this work, we encapsulated DySc2N@C80-SMMs into the internal one-dimensional nanospace of single-walled carb...
Mohammad Rasel Mian, Hiroaki Iguchi, Momoka Miyata, Shinya Takaishi, Hiromichi Yamakawa, Tsubasa Terashige, Tatsuya Miyamoto, Hiroshi Okamoto, Hiroshi Okamoto, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Zeitschrift fur Anorganische und Allgemeine Chemie   644 646-651   2018年8月
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim A novel Br-bridged Pd chain complex, [Pd(hxn)2Br](TsO)2 (2) (TsO– = p-toluenesulfonate), was synthesized from a new in-plane ligand (3S,4S)-3,4-diaminohexane (hxn). 2 forms PdII/PdIV mixed-valenc...
Keiichi Katoh, Satoshi Yamashita, Nobuhiro Yasuda, Yasutaka Kitagawa, Brian K. Breedlove, Yasuhiro Nakazawa, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Angewandte Chemie - International Edition   57 9262-9267   2018年7月
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Magnetic dipole interactions are dominate in quasi one-dimensional (1D) molecular magnetic materials, in which TbNcPc units (Tb3+=terbium(III) ion, Nc2−=naphthalocyaninato, Pc2−=phthalocyaninato)...
David C. Izuogu, David C. Izuogu, David C. Izuogu, Takefumi Yoshida, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, Keiichi Katoh, Shuhei Ogata, Miki Hasegawa, Hiroyuki Nojiri, Marko Damjanović, Wolfgang Wernsdorfer, Wolfgang Wernsdorfer, Tomoya Uruga, Toshiaki Ina, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   24 9169   2018年7月
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Invited for the cover of this issue are David C. Izuogu and Takefumi Yoshida with the group of Masahiro Yamashita and co-workers at Tohoku University, Karlsruhe Institute of Technology, Aoyama Ga...
Shohei Kumagai, Shinya Takaishi, Mengqi Gao, Hiroaki Iguchi, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   57 3775-3781   2018年4月
© 2018 American Chemical Society. MX chains have been widely studied as a 1D mixed-valence system. Although there have been a large number of studies on the boundary between class II and III materials of the Robin-Day classification, there are few...
Yoji Horii, Shuhei Kishiue, Marko Damjanović, Marko Damjanović, Keiichi Katoh, Brian K. Breedlove, Markus Enders, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   24 4320-4327   2018年3月
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A TbIII-phthalocyaninato double-decker ([1]0) single-molecule magnet (SMM) having four 15-crown-5 moieties in one of the ligands was synthesized, and its dimerization and magnetic properties were...
Goulven Cosquer, Goulven Cosquer, Mritunjoy Kamila, Zhao Yang Li, Zhao Yang Li, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Inorganics   6    2018年3月
© 2018 by the authors. A photo-switchable single molecule-magnet (SMM) with two Dy ions bridged by a bis-bipyridine-dithienylethene ligand was synthesised. Isomerisation effects on the magnetic properties were investigated. Particular attention wa...
Ryuta Ishikawa, Shoichi Michiwaki, Takeshi Noda, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Kouki Matsubara, Satoshi Kawata
Inorganics   6    2018年3月
© 2018 by the authors. We synthesized the dinuclear and mononuclear dysprosium(III) complexes [{Dy(Tp)2}2(Cl2An)]˙ 2CH2Cl2(1) and [Co(Cp)2][Dy(Tp)2(Cl2An)] (3), where Cl2An2-and Tp-are the chloranilate and hydrotris(pyrazolyl)borate ligand, respec...
Takaumi Morita, Marko Damjanović, Marko Damjanović, Keiichi Katoh, Yasutaka Kitagawa, Nobuhiro Yasuda, Yanhua Lan, Wolfgang Wernsdorfer, Wolfgang Wernsdorfer, Brian K. Breedlove, Markus Enders, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Journal of the American Chemical Society   140 2995-3007   2018年2月
© 2018 American Chemical Society. Herein we report the synthesis and characterization of a dinuclear TbIII single-molecule magnet (SMM) with two [TbPc2]0 units connected via a fused-phthalocyaninato ligand. The stable and robust complex [(obPc)Tb(...
Priyanka Pandey, Goulven Cosquer, Goulven Cosquer, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Sailaja S. Sunkari
ChemistrySelect   3 2240-2244   2018年2月
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim In exploring the role of increased ligand basicity as well as denticity on moving from ethylenediamine (en) or 1,3-diaminopropane (1,3-dap), on supramolecular solid formation, complexation involv...
Richard Murdey, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Naoki Sato
Thin Solid Films   646 17-20   2018年1月
© 2017 Elsevier B.V. The temperature and field dependence of the electrical conductance of neutral radical bis(phthalocyaninato)terbium(III) (TbPc2) thin films was measured in situ under ultrahigh vacuum. The films behave electrically as narrow ga...
Yoji Horii, Yusuke Horie, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   57 565-574   2018年1月
© 2017 American Chemical Society. Synthesis, structures, and magnetic properties of α-butoxy-substituted phthalocyaninato double-decker complexes Tb(α-obPc)2(1-) (α-obPc: dianion of 1,4,8,11,15,18,22,25-octa(n-butoxy)phthalocyaninato) with protona...
Shohei Kumagai, Shinya Takaishi, Hiroaki Iguchi, Brian K. Breedlove, Takuya Kaneko, Hiroshi Ito, Shin Ichi Kuroda, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   57 12-15   2018年1月
© 2017 American Chemical Society. Hydrostatic (physical) pressure effects on the electrical resistivity of a bromido-bridged palladium compound, [Pd(en)2Br](Suc-C5)2·H2O, were studied. The charge-density-wave to Mott-Hubbard phase transition tempe...
Goulven Cosquer, Yongbing Shen, Manuel Almeida, Manuel Almeida, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   47 7616-7627   2018年1月
© 2018 The Royal Society of Chemistry. Multifunctional molecular materials exhibiting electrical conductivity and single-molecule magnet (SMM) behaviour are particularly attractive for electronic devices and related applications owing to the inter...
Keiichi Katoh, Koichi Kagesawa, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Materials and Energy   4 271-344   2018年1月
© 2018 World Scientific Publishing Co. Pte. Ltd. Single-molecules magnets (SMMs) and single-chain magnets (SCMs) are thought to be the magnetic materials for next-generation storage devices since one molecule of an SMM or a chain of an SCM can beh...
Haitao Zhang, Ryo Nakanishi, Keiichi Katoh, Brian K. Breedlove, Yasutaka Kitagawa, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   47 302-305   2018年1月
© 2018 The Royal Society of Chemistry. Structures and magnetic characteristics of two three-coordinate erbium(iii) compounds with C3vgeometry, tris(2,6-di-tert-butyl-p-cresolate)erbium, Er(dbpc)3(1) and tris(bis(trimethylsilyl)methyl)erbium, Er(bt...
Habib Md Ahsan, Brian K. Breedlove, Santivongskul Piangrawee, Mohammad Rasel Mian, Ahmed Fetoh, Goulven Cosquer, Goulven Cosquer, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   47 11313-11316   2018年1月
© 2018 The Royal Society of Chemistry. A binary system consisting of a ditopic planar pseudo-pincer ligand (qlca = quinoline-2-carbaldehyde (pyridine-2-carbonyl) hydrazone) coordinated to two metal centres affording [{Ru(bpy)2}(μ-qlca)NiCl2]Cl·4H2...
Leena Mandal, Soumava Biswas, Goulven Cosquer, Yongbing Shen, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   47 17493-17499   2018年1月
© The Royal Society of Chemistry. The work in this present investigation reports the syntheses, crystal structures and magnetic properties of five dinuclear lanthanide complexes having compositions [Tb2(HL)4(NO3)6] (1), [Tb2(HL)4Cl6]·2EtOH (2), [Y...
Keiichi Katoh, Koichi Kagesawa, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
World Scientific Reference On Spin In Organics   4-4 271-244   2017年12月
© 2018 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. Single-molecules magnets (SMMs) and single-chain magnets (SCMs) are thought to be the magnetic materials for next-generation storage devices since one molecule of an SMM or a...
Masahiro Yamashita
Polyhedron   136 1   2017年11月
Keiichi Katoh, Yu Aizawa, Takaumi Morita, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   23 15377-15386   2017年11月
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim When applying single-molecule magnets (SMMs) to spintronic devices, control of the quantum tunneling of the magnetization (QTM) as well as a spin-lattice interactions are important. Attempts have...
Zhifu Liang, Marko Damjanović, Mritunjoy Kamila, Goulven Cosquer, Goulven Cosquer, Brian K. Breedlove, Markus Enders, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   56 6512-6521   2017年6月
© 2017 American Chemical Society. Two double-decker complexes with annulene ligands functionalized with indolenine groups were synthesized and characterized. The position of the proton acting as a counterion on one of the four indolenine nitrogen ...
Tsutomu Yamabayashi, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Molecules   22    2017年6月
© 2017 by the authors. Single-molecule magnet (SMM) properties of crystals of a terbium(III)-phthalocyaninato double-decker complex with different molecular packings (1: TbPc2, 2: TbPc2·CH2Cl2) were studied to elucidate the relationship between th...
Mohammad Rasel Mian, Hiroaki Iguchi, Shinya Takaishi, Hideaki Murasugi, Tatsuya Miyamoto, Hiroshi Okamoto, Hisaaki Tanaka, Shin Ichi Kuroda, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Journal of the American Chemical Society   139 6562-6565   2017年5月
© 2017 American Chemical Society. A Br-bridged Pd chain complex with the Pd ion in an uncommon +3 oxidation state, [Pd(dabdOH)2Br]Br2(3), was prepared using a new method involving multiple hydrogen bonds. The PdBr chain complex exhibited superior ...
Takefumi Yoshida, Takefumi Yoshida, Goulven Cosquer, Goulven Cosquer, David Chukwuma Izuogu, David Chukwuma Izuogu, Hiroyoshi Ohtsu, Masaki Kawano, Yanhua Lan, Wolfgang Wernsdorfer, Hiroyuki Nojiri, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   23 4551-4556   2017年4月
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Heterometallic Gd−Pt complexes ([Gd2Pt3(H2O)2(SAc)12] (SAc=thioacetate), [Y1.4Gd0.6Pt3(H2O)2(SAc)12], and [Gd2Pt3(H2O)6(SAc)12]⋅7 H2O have been synthesized. The crystal structures and DFT calcula...
Mritunjoy Kamila, Goulven Cosquer, Goulven Cosquer, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Bulletin of the Chemical Society of Japan   90 595-603   2017年1月
© 2017 The Chemical Society of Japan. Three complexes, [Dy{5-(5-methylthiophen-2-yl)-2,2- bipyridine}(hfac)3] (6), [Dy{5-(4-bromo-5-methylthiophen-2- yl)-2,2-bipyridine}(hfac)3] (7) and [Dy{5-(4-ethynyl-5-methylthio- phen-2-yl)-2,2-bipyridine}(hfa...
Takuro Okamura, Bin Wu, Hiroaki Iguchi, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Wataru Kosaka, Hitoshi Miyasaka, Shinya Takaishi
Chemical Communications   53 6512-6515   2017年1月
© 2017 The Royal Society of Chemistry. We synthesized cyano-bridged three dimensional metal-organic frameworks [MII(H2O)2PtIV(CN)4Br2]∞·n(H2O) (1: M = Co, 2: M = Ni) with an NbO type topology. Although 1 and 2 have no accessible pores, these MOFs ...
Shi Wang, Ya Juan Li, Fei Fei Ju, Wu Tan Xu, Koichi Kagesawa, Yong Hua Li, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Wei Huang, Wei Huang
Dalton Transactions   46 11063-11077   2017年1月
© 2017 The Royal Society of Chemistry. Manganese(iii) hexadentate Schiff base complexes ([Mn(sal-N-1,5,8,12)]Y·S, Y = AsF6 (1); Y = SbF6 (2); Y = NO3, S = C2H5OH (3) and Y = Cl (4)) have been investigated to determine the impact of anion effects, ...
Takefumi Yoshida, David Chukwuma Izougu, David Chukwuma Izougu, Daichi Iwasawa, Shuhei Ogata, Miki Hasegawa, Brian K. Breedlove, Brian K. Breedlove, Goulven Cosquer, Goulven Cosquer, Wolfgang Wernsdorfer, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   23 10527-10531   2017年1月
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A heterometallic Tb-Pt complex, [Tb2Pt3(SAc)12(H2O)2] (SAc=thioacetate), was synthesized. Dual emission was modulated by the presence of a heterometallic Tb–Pt bonding environment. The heterometa...
Ryo Nakanishi, Mudasir Ahmad Yatoo, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Materials   10    2017年1月
© 2016 by the authors; licensee MDPI, Basel, Switzerland. Dy single-molecule magnets (SMMs), which have several potential uses in a variety of applications, such as quantum computing, were encapsulated in multi-walled carbon nanotubes (MWCNTs) by ...
Yoji Horii, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemical Communications   53 8561-8564   2017年1月
© 2017 The Royal Society of Chemistry. A clamshell-type terbium(iii)-phthalocyaninato quadruple-decker complex was synthesized. Magnetic measurements revealed that Tb-Tb interactions caused an increase in the magnetic relaxation time and enhanced ...
Hikaru Iwami, Ryo Nakanishi, Yoji Horii, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Materials   10    2017年1月
© 2017 by the authors. Lanthanoid metal-organic frameworks (Ln-MOFs) can adopt a variety of new structures due to the large coordination numbers of Ln metal ions, and Ln-MOFs are expected to show new luminescence and magnetic properties due to the...
Koichi Kagesawa, Koichi Kagesawa, Yuki Nishimura, Hiroki Yoshida, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Hitoshi Miyasaka
Dalton Transactions   46 3170-3178   2017年1月
© The Royal Society of Chemistry. Two-dimensional layered compounds with different counteranions, [{Mn(salen)}4C6](BF4)2·2(CH3OH) (1) and [{Mn(salen)}4C6](PF6)2·2(CH3OH) (2) (salen2− = N,N′-bis(salicylideneiminato), C62− = C6H12(COO)22−), were syn...
Yoji Horii, Keiichi Katoh, Goulven Cosquer, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   55 11782-11790   2016年11月
© 2016 American Chemical Society. The DyIIIquintuple-decker complex DyCdCdDy and hetero quadruple-decker complex DyCdY were synthesized, and their magnetic properties were compared with those of the quadruple-decker complex DyCdDy. Single-crystal ...
Marko Damjanović, Takaumi Morita, Yoji Horii, Keiichi Katoh, Masahiro Yamashita, Markus Enders
ChemPhysChem   17 3423-3429   2016年11月
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Ion pairing between the paramagnetic anion [Tb(obPc)2]−(obPc=2,3,9,10,16,17,23,24-octabutoxyphthalocyaninato), which has a very large magnetic anisotropy, with various diamagnetic counterions [P(...
Yuka Hosomi, Shoji Yoshida, Atsushi Taninaka, Takefumi Yoshida, Shinya Takaishi, Osamu Takeuchi, Masahiro Yamashita, Hidemi Shigekawa
Japanese Journal of Applied Physics   55    2016年8月
© 2016 The Japan Society of Applied Physics. The temperature dependence of the Peierls-Hubbard phase transition in [Pd(cptn)2Br]Br2(cptn: 1R,2R-diaminocyclopentane) was directly observed using a low- Temperature scanning tunneling microscope. A sh...
Shuai Mu, Kazuaki Oniwa, Tienan Jin, Naoki Asao, Masahiro Yamashita, Shinya Takaishi
Organic Electronics: physics, materials, applications   34 23-27   2016年7月
© 2016 Elsevier B.V. All rights reserved. A highly emissive red luminescent single crystal which shows aggregation induced emission (AIE) property and optical waveguide edge emission based on small organic functional molecule, cyano-substituted 2,...
Ryuta Ishikawa, Yoji Horii, Ryo Nakanishi, Ryo Nakanishi, Shunya Ueno, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Satoshi Kawata
European Journal of Inorganic Chemistry   2016 3220   2016年7月
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Invited for the cover of this issue is the group of Ryuta Ishikawa at Fukuoka University, Japan, collaborating with the group of Masahiro Yamashita at Tohoku University, Japan. The cover image sh...
Ryuta Ishikawa, Yoji Horii, Ryo Nakanishi, Ryo Nakanishi, Shunya Ueno, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Satoshi Kawata
European Journal of Inorganic Chemistry   2016 3219   2016年7月
Zhao Yang Li, Hiroyoshi Ohtsu, Tatsuhiro Kojima, Jing Wei Dai, Takefumi Yoshida, Brian K. Breedlove, Wei Xiong Zhang, Hiroaki Iguchi, Osamu Sato, Masaki Kawano, Masahiro Yamashita
Angewandte Chemie - International Edition   55 5184-5189   2016年4月
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. A neutral mononuclear FeIII complex [FeIII(H-5-Br-thsa-Me)(5-Br-thsa-Me)] H2O (1; H2-5-Br-thsa-Me=5-bromosalicylaldehyde methylthiosemicarbazone) was prepared that exhibited a three-step spin-cr...
Keiichi Katoh, Tadahiro Komeda, Masahiro Yamashita
Chemical Record   16 987-1016   2016年4月
© 2016 The Chemical Society of Japan & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Ever since the first example of a double-decker complex (SnPc2) was discovered in 1936, MPc2 complexes with π systems and chemical and physical stabilities have...
Ahmed Fetoh, Ahmed Fetoh, Goulven Cosquer, Goulven Cosquer, Masakazu Morimoto, Masahiro Irie, Ola El-Gammal, Gaber Abu El-Reash, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Scientific Reports   6    2016年3月
A major roadblock to fully realizing molecular electronic devices is the ability to control the properties of each molecule in the device. Herein we report the control of the magnetic properties of single-molecule magnets (SMMs), which can be used...
Ritwik Modak, Yeasin Sikdar, Goulven Cosquer, Goulven Cosquer, Sudipta Chatterjee, Masahiro Yamashita, Masahiro Yamashita, Sanchita Goswami
Inorganic Chemistry   55 691-699   2016年1月
© 2015 American Chemical Society. The synthesis, structures, and magnetic properties of two heterometallic CuII-DyIIIclusters are reported. The first structural motif displays a pentanuclear CuII4DyIIIcore, while the second one reveals a nonanucle...
E. Coronado, M. Yamashita
Dalton Transactions   45 16553-16555   2016年1月
Shi Wang, Wu Tan Xu, Wen Rui He, Shinya Takaishi, Yong Hua Li, Masahiro Yamashita, Wei Huang, Wei Huang
Dalton Transactions   45 5676-5688   2016年1月
© 2016 The Royal Society of Chemistry. A series of new salts [Mn(5-MeO-sal-N-1,5,8,12)]Y (Y = ClO4for 1, Y = BF4for 2, Y = NO3for 3 and Y = CF3SO3for 4) based on the six-coordinated mononuclear manganese(iii) Schiff-base complex cation [Mn(5-MeO-s...
Ryuta Ishikawa, Yoji Horii, Ryo Nakanishi, Ryo Nakanishi, Shunya Ueno, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Satoshi Kawata
European Journal of Inorganic Chemistry   2016 3233-3239   2016年1月
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)2(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn2–= chloranilate) and its magnetically diluted analogue [Co0.1Zn0.9(bpy)2(ClAn)]·E...
Gregor Kieslich, Shohei Kumagai, Shohei Kumagai, Shohei Kumagai, Alexander C. Forse, Shijing Sun, Sebastian Henke, Sebastian Henke, Masahiro Yamashita, Masahiro Yamashita, Clare P. Grey, Anthony K. Cheetham
Chemical Science   7 5108-5112   2016年1月
© 2016 The Royal Society of Chemistry. We report how mechanical and dynamical properties in formate-based perovskites can be manipulated by the preparation of an A-site solid-solution. In the series [NH3NH2]1-x[NH3OH]xZn(HCOO)3with xmax= 0.48, the...
Ferdous Ara, Zhi Kun Qi, Zhi Kun Qi, Jie Hou, Jie Hou, Tadahiro Komeda, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   45 16644-16652   2016年1月
© 2016 The Royal Society of Chemistry. In this article, we investigate a single molecule magnet bis(phthalocyaninato)terbium(iii) (TbPc2) molecule film by using low temperature STM. In order to investigate the effect of molecule-substrate interact...
Takefumi Yoshida, Takefumi Yoshida, Shinya Takaishi, Shinya Takaishi, Hiroaki Iguchi, Hiroaki Iguchi, Hiroshi Okamoto, Hisaaki Tanaka, Shin Ichi Kuroda, Yuka Hosomi, Shoji Yoshida, Hidemi Shigekawa, Tatsuhiro Kojima, Hiroyoshi Ohtsu, Masaki Kawano, Brian K. Breedlove, Brian K. Breedlove, Laurent Guérin, Masahiro Yamashita, Masahiro Yamashita
ChemistrySelect   1 259-263   2016年1月
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim We synthesized a bromo-bridged Pd complex, which underwent as lowering the temperature a charge-density-wave (CDW) to Mott-Hubbard (MH) phase transition, as confirmed by using X-ray diffraction a...
Eufemio Moreno Pineda, Tadahiro Komeda, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Mario Ruben, Mario Ruben, Mario Ruben
Dalton Transactions   45 18417-18433   2016年1月
© The Royal Society of Chemistry. Since 2003, terbium(iii) bis-phthalocyaninato complexes have been recognised as acting as single molecule magnets (SMMs), propitiating multiple studies with the aim of better understanding the single metal-ion bas...
Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita
Chemical Science   7 4329-4340   2016年1月
© 2016 The Royal Society of Chemistry. Single-molecule magnet (SMM) properties of terbium(iii)-phthalocyaninato and porphyrinato mixed ligand triple-decker complexes, [(TTP)Tb(Pc)Tb(TTP)] (1) and [(Pc)Tb(Pc)Tb(TTP)] type (2), were studied and were...
Marko Damjanović, Yusuke Horie, Takaumi Morita, Yoji Horii, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Markus Enders
Inorganic Chemistry   54 11986-11992   2015年12月
© 2015 American Chemical Society. Synthesis of the anionic, α-substituted, bis(phthalocyaninato)TbIIIcomplex [Tb(α-obPc)2]-([1]-) (obPc = α-octabutoxyphthalocyaninato) leads to the isolation of its protonated form [1H]0. This complex was character...
Marko Damjanovic, Takaumi Morita, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Markus Enders
Chemistry - A European Journal   21 14421-14432   2015年10月
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. The phthalocyaninato double-decker complexes [M(obPc)<inf>2</inf>]0 (M= YIII, TbIII, DyIII; obPc=2,3,9,10,16,17,23,24-octabutoxyphthalocyaninato), alo...
Yoshitaka Aono, Hiroki Yoshida, Keiichi Katoh, Keiichi Katoh, Brian K. Breedlove, Brian K. Breedlove, Koichi Kagesawa, Koichi Kagesawa, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   54 7096-7102   2015年7月
© 2015 American Chemical Society. Two-dimensional (2D) coordination polymers consisting of MnIIISchiff-base complexes and dicarboxylic acids, [{Mn(salen)}4(L1)](PF6)2·(CH3OH)2(C4; H2L1 = adipid acid) and [{Mn(salen)}4(L2)](PF6)2·(CH3OH)4(C4′; H2L2...
Shohei Kumagai, Shohei Kumagai, Shinya Takaishi, Shinya Takaishi, Hiroaki Iguchi, Hiroaki Iguchi, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   44 8590-8599   2015年5月
© 2015 The Royal Society of Chemistry. Quasi-one-dimensional halogen-bridged Pt, Pd, and Ni complexes (MX chains) are a family of materials with potential charge bistability: M(ii)-M(iv) mixed valence charge-density-wave (CDW) and M(iii) averaged ...
Goulven Cosquer, Goulven Cosquer, Masakazu Morimoto, Masahiro Irie, Ahmed Fetoh, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   44 5996-6002   2015年4月
© The Royal Society of Chemistry 2015. Two-dimensional Dy(iii) and Ho(iii) homometal coordination polymers containing the photochromic ligand 1,2-bis(5-carboxyl-2-methyl-3-thienyl)perfluorocyclopentene (DTE) with the general formula [Ln2(DTE)3(bip...
Yoji Horii, Keiichi Katoh, Keiichi Katoh, Nobuhiro Yasuda, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   54 3297-3305   2015年4月
© 2015 American Chemical Society. Single-molecule magnet (SMM) properties of terbium(III)-phthalocyaninato quintuple-decker complex TbCdCdTb were studied and were compared with those of other multiple-decker complexes (triple-decker: TbTb, quadrup...
Goulven Cosquer, Goulven Cosquer, Brian K. Breedlove, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   44 2936-2942   2015年2月
© The Royal Society of Chemistry. Chemists and physicists are continuously working to understand the mechanisms controlling molecular magnetism, especially single-molecule magnetism, to improve the magnetic properties, such as the blocking tempera...
Gregor Kieslich, Shohei Kumagai, Shohei Kumagai, Shohei Kumagai, Keith T. Butler, Takuro Okamura, Christopher H. Hendon, Shijing Sun, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Aron Walsh, Anthony K. Cheetham
Chemical Communications   51 15538-15541   2015年1月
© The Royal Society of Chemistry. Polymorphism in formate-based dense metal-organic frameworks with the general formula ABX3is predicted by quantum chemical calculations and confirmed experimentally. In particular [NH3NH2]Zn(HCOO)3crystallizes in ...
Shohei Kumagai, Shohei Kumagai, Hiroaki Iguchi, Shinya Takaishi, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita, Hiroyuki Matsuzaki, Hiroshi Okamoto, Kenichi Kato, Kenichi Kato, Masaki Takata, Masaki Takata
Inorganic Chemistry   53 11764-11769   2014年11月
© 2014 American Chemical Society. The optical gap in a series of bromo-bridged platinum chain complexes, [Pt(en)2Br](Cn-Y)2·H2O (en = ethylenediamine; Cn-Y = dialkyl sulfosuccinate; n = the number of carbon atoms), was controlled by using chemical...
H. Matsuzaki, M. Iwata, T. Miyamoto, T. Terashige, K. Iwano, S. Takaishi, M. Takamura, S. Kumagai, M. Yamashita, R. Takahashi, Y. Wakabayashi, H. Okamoto
Physical Review Letters   113    2014年8月
Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave (CDW) state, were achieved in a bromine-bridged Pd-chain compound [Pd(en)2Br](C5-Y)2H2O (en=ethylenediamine a...
Shohei Kumagai, Shohei Kumagai, Shinya Takaishi, Brian K. Breedlove, Hiroshi Okamoto, Hisaaki Tanaka, Shin Ichi Kuroda, Masahiro Yamashita, Masahiro Yamashita, Masahiro Yamashita
Chemical Communications   50 8382-8384   2014年8月
We synthesized and characterized bromide-bridged Pd(iii) chain complexes, [Pd(en)2Br](MalCn-Y)2·H2O (en = ethylenediamine; MalCn-Y = dialkyl sulfomalonate; n: the number of carbon atoms) (n = 7 and 12). The compound with n = 7 showed charge-bistab...
Hiroaki Iguchi, Hiroaki Iguchi, Shinji Kitao, Makoto Seto, Shinya Takaishi, Shinya Takaishi, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   43 8767-8773   2014年6月
129I Mössbauer spectroscopy was applied to water-vapor-responsive MMX-type quasi-one-dimensional iodide-bridged Pt complexes (MMX chains) in order to investigate their electronic state quantitatively. Two sets of octuplets observed in K2(H3NC3H6NH...
Keiichi Katoh, Keiichi Katoh, Rina Asano, Akira Miura, Yoji Horii, Takaumi Morita, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Dalton Transactions   43 7716-7725   2014年6月
The single-molecule magnet (SMM) behaviour of dinuclear Ln(iii)-Pc triple-decker complexes (Dy(iii)-Y(iii): 1 and Dy(iii)-Dy(iii): 2) with the same octacoordination environment and slow magnetic relaxation behaviour were explained using X-ray crys...
B. K. Breedlove, R. Kandel, H. Md Ahsan, M. Yamashita, M. Yamashita
Dalton Transactions   43 7683-7686   2014年6月
We report the first, solvent-free synthesis of 4-pyridyl tacn, cyclen, and cyclam derivatives as new design elements to prepare electrocatalysts, for example, by the differential metal complexation of 4-pyncyclen (n = 2, 4). This journal is © the ...
Tadahiro Komeda, Tadahiro Komeda, Hironari Isshiki, Hironari Isshiki, Jie Liu, Jie Liu, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita
ACS Nano   8 4866-4875   2014年5月
We demonstrate that the lattice formation of an adsorbed molecule decouples the molecule-substrate interaction to change the Kondo resonance, which occurs due to interactions between conduction electrons and the molecule's unpaired spin. The doubl...
Hiroaki Iguchi, Hiroaki Iguchi, Ayman Nafady, Ayman Nafady, Shinya Takaishi, Shinya Takaishi, Masahiro Yamashita, Masahiro Yamashita, Alan M. Bond
Inorganic Chemistry   53 4022-4028   2014年4月
Electron-transfer-facilitated dissolution, ion insertion, and desorption associated with an MMX-type quasi-one-dimensional iodide-bridged dinuclear Pt complex (MMX chain) have been investigated for the first time. K 2(NC3N)[Pt2(pop)4I]·4H 2O (1) (...
Kenichi Maruyama, Jinpeng Li, Wataru Takahashi, Shu Hotta, Shinya Takaishi, Masahiro Yamashita, Taishi Takenobu, Taishi Takenobu
Japanese Journal of Applied Physics   53    2014年2月
Organic single crystals have excellent transport and unique optical properties, which are very advantageous to light-emitting devices. However, it is still difficult to control the emitting color of these devices and we need to establish a novel m...
Hiroaki Iguchi, Hiroaki Iguchi, Shinya Takaishi, Shinya Takaishi, Masahiro Yamashita, Masahiro Yamashita
Chemistry Letters   43 69-79   2014年1月
MMX-Type quasi-one-dimensional iodide-bridged diplatinum complexes (MMX chains) provide various electronic states and attractive physical properties. In this review, we summarize the recent progress in MMX chains consisting of pyrophosphite (pop) ...
Tadahiro Komeda, Tadahiro Komeda, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita
Progress in Surface Science   89 127-160   2014年1月
We review recent studies of double-decker and triple-decker phthalocyanine (Pc) molecules adsorbed on surfaces in terms of the bonding configuration, electronic structure and spin state. The Pc molecule has been studied extensively in surface scie...
Dawid Pinkowicz, Dawid Pinkowicz, Min Ren, Min Ren, Li Min Zheng, Saki Sato, Miki Hasegawa, Masakazu Morimoto, Masahiro Irie, Brian K. Breedlove, Brian K. Breedlove, Goulven Cosquer, Goulven Cosquer, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita
Chemistry - A European Journal   20 12502-12513   2014年1月
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Lanthanide-based extended coordination frameworks showing photocontrolled single-molecule magnet (SMM) behavior were prepared by combining highly anisotropic DyIIIand HoIIIions with the carboxyla...
Hiroaki Iguchi, Hiroaki Iguchi, Shinya Takaishi, Shinya Takaishi, Deli Jiang, Jimin Xie, Masahiro Yamashita, Masahiro Yamashita, Atsuko Uchida, Hitoshi Kawaji
Inorganic Chemistry   52 13812-13814   2013年12月
Negative differential resistance (NDR) was discovered in MX- and MMX-type iodide-bridged platinum complexes for the first time. The low resistance of the complex observed under the large current cannot be explained only by the Joule heat. The intr...
Takaumi Morita, Keiichi Katoh, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   52 13555-13561   2013年12月
Using a fused phthalocyaninato ligand to control the spatial arrangement of TbIII moieties in TbIII single-molecule magnets (SMMs), we could control the dipole-dipole interactions in the molecules and prepared the first tetranuclear TbIII SMM comp...
Marko Damjanovic, Keiichi Katoh, Keiichi Katoh, Masahiro Yamashita, Masahiro Yamashita, Markus Enders
Journal of the American Chemical Society   135 14349-14358   2013年9月
Several small paramagnetic complexes combine large hyperfine NMR shifts with large magnetic anisotropies. The latter are a prerequisite for single molecule magnet (SMM) behavior. We choose the SMM tris(octabutoxyphthalocyaninato) diterbium (1) for...
Min Ren, Min Ren, Dawid Pinkowicz, Dawid Pinkowicz, Minyoung Yoon, Kimoon Kim, Li Min Zheng, Brian K. Breedlove, Masahiro Yamashita
Inorganic Chemistry   52 8342-8348   2013年8月
A new mononuclear dysprosium(III)-cucurbit[6]uril complex has been synthesized and characterized structurally and magnetically. It exhibits single-ion magnet (SIM) behavior with two slow magnetic relaxation processes, which are very sensitive to t...
Ryuta Ishikawa, Ryo Miyamoto, Hiroyuki Nojiri, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Inorganic Chemistry   52 8300-8302   2013年8月
A MnIII-salen-type complex with a diamagnetic [Co III(CN)6]3- moiety, [MnIII(5-TMAM(R) -salmen)(H2O)CoIII(CN)6]·7H 2O·MeCN [1; 5-TMAM(R)-salmen = (R)-N,N′-(1- methylethylene)bis(5-trimethylammoniomethylsalicylideneiminate], was prepared. From dire...
Ryuta Ishikawa, Motohiro Nakano, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
Polyhedron   64 346-351   2013年7月
Reacting [MnIII(5-TMAM(R)-salmen)(H2O) 2](ClO4)3·H2O with [M III(CN)6]3- moieties yields a series of discrete cyano-bridged heterodinuclear complexes, [MnIII(5-TMAM(R)- salmen)(H2O)MIII(CN)6]·7H 2O·MeCN (where 5-TMAM(R)-salmen = (R)-N,N′-(1- methy...
Wei Xiong Zhang, Wei Xiong Zhang, Ryuta Ishikawa, Brian Breedlove, Masahiro Yamashita
RSC Advances   3 3772-3798   2013年3月
Single-chain magnets (SCMs) are one-dimensional (1D) slow-relaxing magnetic chains with interesting fundamental properties and applications, such as information storage. The mechanism underlying the slow relaxation of SCMs is Glauber dynamics, in ...
Shinya Takaishi, Mami Hada, Nozomi Ishihara, Brian K. Breedlove, Keiichi Katoh, Masahiro Yamashita
Polyhedron   52 333-338   2013年3月
A series of alkali metal salts of bis(2,3-pyrazineditiolate) nickel complexes were synthesized. In these complexes, the Ni(pdt)2units were arranged in one-dimensional stacks. The stacking motifs and resultant physical properties were quite differe...
Tadahiro Komeda, Tadahiro Komeda, Hironari Isshiki, Hironari Isshiki, Jie Liu, Jie Liu, Keiichi Katoh, Keiichi Katoh, Minoru Shirakata, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita
ACS Nano   7 1092-1099   2013年2月
By using scanning tunneling microscopy (STM), we studied the heteroleptic double-decker complex TbNPcPc (NPc = naphthalocyaninato and Pc = phthalocyaninato), where two different planar ligands sandwich a Tb(III) ion and an unpaired π electron caus...
Ryuta Ishikawa, Brian K. Breedlove, Masahiro Yamashita
European Journal of Inorganic Chemistry   716-719   2013年2月
Synthesis and crystal structure of the dinuclear complex threo-[FeIII2(saltab)(Him)4](ClO2)2·2MeOH (1) {H4saltab = (2R,3S)-1,2,3,4- tetrakis(salicylideneamino)butane, a bis-(salen)-type Schiff base ligand, and Him = imidazole} are reported. The ma...
Minseob Shin, Shinya Takaishi, Shohei Kumagai, Yutaro Ueda, Brian K. Breedlove, Hiroyuki Matsuzaki, Hiroshi Okamoto, Yusuke Wakabayashi, Masahiro Yamashita
Journal of the Chemical Society. Dalton Transactions   42 6277-6280   2013年1月
We synthesized a series of one-dimensional (1D) iodo-bridged platinum compounds with long alkyl chains on the counterions. In the compounds, the shortest Pt⋯Pt distance and the smallest band gap thus far reported were achieved. These compounds wer...
Jie Liu, Jie Liu, Hironari Isshiki, Hironari Isshiki, Keiichi Katoh, Keiichi Katoh, Takaumi Morita, Brian K. Breedlove, Masahiro Yamashita, Masahiro Yamashita, Tadahiro Komeda, Tadahiro Komeda
Journal of the American Chemical Society   135 651-658   2013年1月
We investigated spin states of stable neutral pure-organic radical molecules of 1,3,5-triphenyl-6-oxoverdazyl (TOV) and 1,3,5-triphenyl-6- thioxoverdazly (TTV) adsorbed on an Au(111) surface, which appears as a Kondo resonance because of spin-elec...
Luca Pilia, Luca Pilia, Elisa Sessini, Flavia Artizzu, Masahiro Yamashita, Angela Serpe, Kazuya Kubo, Hiroshi Ito, Hisaaki Tanaka, Shin Ichi Kuroda, Jun Ichi Yamada, Paola Deplano, Carlos J. Gómez-García, Maria Laura Mercuri
Inorganic Chemistry   52 423-430   2013年1月
Two new isostructural molecular metals - (BDH-TTP)6[MIII(C5O5)3]·CH2Cl2(BDH-TTP = 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6- tetrathiapentalene, where M = Fe (1) and Ga (2)) - have been prepared and fully characterized. Compound 1 is a molecular co...
Kazuya Kubo, Hiroki Hiraga, Hitoshi Miyasaka, Masahiro Yamashita
Multifunctional Molecular Materials   61-103   2012年12月
A new strategy for the preparation of hybridized materials with coexisting magnetism and conductivity was developed using single-molecule magnets (SMMs) and molecular conductors. The new strategy has various advantages including easy modification ...
Masahiro Yamashita
Dalton Transactions   41 13555   2012年11月
Keiichi Katoh, Yoji Horii, Nobuhiro Yasuda, Wolfgang Wernsdorfer, Koshiro Toriumi, Brian K. Breedlove, Masahiro Yamashita
Dalton Transactions   41 13582-13600   2012年11月
The SMM behaviour of dinuclear Ln(iii)-Pc multiple-decker complexes (Ln = Tb3+ and Dy3+) with energy barriers and slow-relaxation behaviour were explained by using X-ray crystallography and static and dynamic susceptibility measurements. In partic...
Masahiro Yamashita
Journal of the Chemical Society. Dalton Transactions   41 13555-13555   2012年10月
Hiroaki Iguchi, Hiroaki Iguchi, Shinya Takaishi, Brian K. Breedlove, Masahiro Yamashita, Hiroyuki Matsuzaki, Hiroyuki Matsuzaki, Hiroshi Okamoto
Inorganic Chemistry   51 9967-9977   2012年9月
MMX-type quasi-one-dimensional iodide-bridged dinuclear Pt complexes (MMX chains) with binary countercations show a new alternating charge-polarization + charge-density-wave (ACP+CDW) electronic state and reversible switching of the electronic sta...
Ryuta Ishikawa, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita
Inorganic Chemistry   51 9123-9131   2012年8月
A single-chain magnet (SCM) of [Mn(TBPP)(TCNE)] ·4m-PhCl 2 (1), where TBPP 2- = meso-tetra(4-biphenyl)porphyrinate; TCNE ·- = tetracyanoethenide radical anion; m-PhCl 2 = meta-dichlorobenzene, was prepared via suppression of interchain interaction...
Roberto Robles, Nicolás Lorente, Hironari Isshiki, Hironari Isshiki, Jie Liu, Jie Liu, Keiichi Katoh, Brian K. Breedlove, Masahiro Yamashita, Tadahiro Komeda, Tadahiro Komeda
Nano Letters   12 3609-3612   2012年7月
Being able to control the spin of magnetic molecules at the single-molecule level will make it possible to develop new spin-based nanotechnologies. Gate-field effects and electron and photon excitations have been used to achieve spin switching in ...
Hiroyuki Matsuzaki, Shinya Takaishi, Mitsuhito Takamura, Shohei Kumagai, Masahiro Yamashita, Hiroshi Okamoto, Hiroshi Okamoto
Journal of the Physical Society of Japan   81    2012年7月
Temperature- and pressure-induced transitions from the charge-density-wave (CDW) phase to the Mott-Hubbard (MH) phase in the quasi-one-dimensional Br-bridged Pd compound, [Pd(en) 2Br](Cn-Y) 2·H 2O (n = 4-9, and 12) (en: ethylenediamine, C n-Y: dia...
Keiichi Katoh, Hironari Isshiki, Tadahiro Komeda, Masahiro Yamashita
Chemistry - An Asian Journal   7 1154-1169   2012年6月
Unlike electronics, which is based on the freedom of the charge of an electron whose memory is volatile, spintronics is based on the freedom of the charge, spin, and orbital of an electron whose memory is non-volatile. Although in most GMR, TMR, a...
Keiichi Katoh, Kaori Umetsu, K. Breedlove Brian, Masahiro Yamashita
Science China Chemistry   55 918-925   2012年6月
The SMM properties of the spatially closed Dy(III) double-decker Pc complex Dy(obPc) 2 (1), which is equivalent to a pseudo dinuclear complex, are reported. Complex 1 crystallized with ethanol in the crystal lattice in the monoclinic space group P...
Wei Xiong Zhang, Takuya Shiga, Hitoshi Miyasaka, Masahiro Yamashita
Journal of the American Chemical Society   134 6908-6911   2012年4月
Two one-dimensional (1D) manganese complexes, [Mn 2(naphtmen) 2(L)](ClO 4)·2Et 2O·2MeOH· H 2O (1) and [Mn 2(naphtmen) 2(HL)](ClO 4) 2·MeOH (2), were synthesized by using a bridging ligand with a nucleobase moiety, 6-amino-9-β-carboxyethylpurine, a...
Kazuya Kubo, Kazuya Kubo, Masahiro Yamashita
Crystals   2 284-293   2012年4月
A new mixed-anion crystal composed of BEDT-TTF radical cation salt [BEDT-TTF]2(CuBr2)0.4(CuCl2)0.6 with an α'-type donor arrangement with a formal charge of +0.5 per BEDT-TTF was prepared by using a chemical oxidation method and characterized by u...
Hitoshi Miyasaka, Tomokura Madanbashi, Ayumi Saitoh, Natsuko Motokawa, Ryuta Ishikawa, Masahiro Yamashita, Stefan Bahr, Wolfgang Wernsdorfer, Rodolphe Clérac, Rodolphe Clérac
Chemistry - A European Journal   18 3942-3954   2012年3月
A series of isostructural cyano-bridged Mn III(h.s.)-M III(l.s.) alternating chains, [Mn III(5-TMAMsalen)M III(CN) 6]·4H 2O (5-TMAMsalen 2-=N,N′-ethylenebis(5- trimethylammoniomethylsalicylideneiminate), Mn III(h.s.)=high-spin Mn III, M III(l.s.)=...
Hisaaki Tanaka, Shin Ichi Kuroda, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
Physical Review B - Condensed Matter and Materials Physics   85    2012年2月
Electron spin resonance (ESR) measurements have been performed on a series of quasi-one-dimensional iodo-bridged diplatinum complexes K 2[C 3H 5R(NH 3) 2][Pt 2(pop) 4I]•4H 2O (pop = P 2H 2O 52 -; R = H, CH 3, or Cl), where dehydration/rehydration ...

Misc

 
Masahiro Yamashita, Hiroshi Okamoto, Hiroshi Okamoto, Hiroshi Okamoto, Hiroaki Iguchi, Kaoru Iwano, Hideo Kishida, Hiroyuki Matsuzaki, Hiroyuki Matsuzaki, Minoru Mitsumi, Arao Nakamura, Shinya Takaishi, Kenji Yonemitsu, Kenji Yonemitsu, Kenji Yonemitsu
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172 1-270   2012年6月
© 2013 Springer-Verlag Wien. All rights reserved. This is the first book to comprehensively address the recent developments in both the experimental and theoretical aspects of quasi-one-dimensional halogen-bridged mono- (MX) and binuclear metal (M...
Atsushi Sugita, Masahiro Yamashita, Takayoshi Kobayashi
Springer Series in Chemical Physics   63 342-344   1998年12月
Ultrafast dynamics of a quasi-one-dimensional halogen bridged mixed valence metal complex (HMMC) is studied by the pump-probe spectroscopy extending over 0.5-2.5 eV. Just after the photo-excitation, non-thermal self-trapped excitions (STE's) are g...
巨大な三次非線形光学効果を持つ一次元金属錯体の発見
山下正廣
化学   56 30-34   2001年8月
ナノワイヤー単分子磁石ができた!
山下正廣
化学   57 12-16   2002年12月
Ken ichi Sugiura, Hitoshi Miyasaka, Tomohiko Ishii, Masahiro Yamashita
Springer Series in Chemical Physics   70 59-72   2003年1月
This chapter reviews single-molecule observations of porphyrinoid molecules. These are versatile materials that have excellent physical properties associated with their expanded π-electron systems, which are likely to find applications in future n...
Yuichi Ogawa, Kodo Kawase, Masahiro Yamashita, Masahiro Yamashita, Hiroyuki Inoue
OSA Trends in Optics and Photonics Series   96 A 97-99   2004年1月
We have developed a novel basic technology for terahertz imaging, which allows detection and identification of drugs concealed in envelopes, by introducing the component spatial pattern analysis. The spatial distributions of the targets are obtain...
単分子量子磁石における分子間相互作用がおもしろい?
山下正廣
化学   59 68-69   2004年3月
STMによりついにソリトンの直接観測に成功!!
山下正廣
化学   59 32-35   2004年7月
STMによるスピンソリトンも直接観測
山下正廣
固体物理   40(5) 327-332   2005年5月
国会図書館の全情報を角砂糖サイズの分子性量子磁石に収納したい
山下正廣
   2006年
次世代型高次機能性ナノ金属錯体の新奇科学
山下正廣、川上大輔
   2006年
強相関電子系ナノワイヤー金属錯体を用いた非線形光学素子をめざして
山下正廣、高石慎也
   2006年
外場によって誘起される相転移ー多重機能性ナノデバイスの応用に向けてー
高石慎也、山下正廣
東京化学同人      2006年
Tomohiko Ishii, Yukikazu Fuke, Naoko Aizawa, Masahiro Yamashita
Advances in Quantum Chemistry   54 35-46   2008年3月
The electronic structures of the Haldane gap compounds that include NiII ions having s=1 spin are reported. The azido-bridged Haldane gap compounds, such as NINAZ ([Ni(NH2(CH2)3NH2)2N3]ClO4), NDMAZ ([Ni(NH2CH2C(CH3)2CH2NH2)2N3]ClO4), and NDMAP ([N...
ラダー型MX錯体の開発—— 一次元から二次元へ、境界への挑戦ー
川上大輔、山下正廣
化学   63 70-71   2008年4月
自然界の乱れをSTMにより直接観測する ——巨大三次非線形光学材料探索中のハプニングー
Wu Hashen, その他
現代化学   46-51   2008年5月
構造制御に基づく単一次元鎖磁石の創製
平賀広貴,その他
化学工業   59 417-422   2008年7月
Masahiro Yamashita, Hiroshi Okamoto
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   1-270   2013年1月
© Springer-Verlag Wien 2013. This is the first book to comprehensively address the recent developments in both the experimental and theoretical aspects of quasi-one-dimensional halogen-bridged mono- (MX) and binuclear metal (MMX) chain complexes o...
Kazuya Kubo, Hiroki Hiraga, Hitoshi Miyasaka, Masahiro Yamashita
Multifunctional Molecular Materials   61-104   2013年1月
© 2013 Pan Stanford Publishing Pte. Ltd. A new strategy for the preparation of hybridized materials with coexisting magnetism and conductivity was developed using single-molecule magnets (SMMs) and molecular conductors. The new strategy has variou...
Masahiro Yamashita, Hiroshi Okamoto
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds      2013年1月
Masahiro Yamashita, Hiroshi Okamoto
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172    2013年6月
Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172 207-230   2013年6月
© 2013 Springer-Verlag Wien. All rights reserved. Pyrophosphito-bridged diplatinum complex is one of the most studied dinuclear complexes in a paddle-wheel structure. The chemistry of pyrophosphito-bridged diplatinum complex began at the discovery...
S. Takaishi, M. Yamashita
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172 31-37   2013年6月
© 2013 Springer-Verlag Wien. All rights reserved. For a long time, MX-chain compounds have been extensively studied since Wolffram reported Cl-bridged Pt complex in 1900. To date, more than 300 compounds were reported by combining metal ions (M = ...
S. Takaishi, M. Yamashita
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172 1-6   2013年6月
© 2013 Springer-Verlag Wien. All rights reserved. For a long time, quasi-one-dimensional (Q1D) halogen-bridged metal complexes have attracted much attention of chemists and physicists because of significant physical properties based on their Q1D e...
S. Takaishi, M. Yamashita
Material Designs and New Physical Properties in MX- and MMX-Chain Compounds   9783709113172 39-54   2013年6月
© 2013 Springer-Verlag Wien. All rights reserved. In spite of long history of MX-chain complexes, all Pt or Pd compounds are in CDW state, without exception. We have recently succeeded in realizing Pd(III) MH state by two methods, that is, one is ...
M. Yamashita, S. Takaishi
Comprehensive Inorganic Chemistry II (Second Edition): From Elements to Applications   4 431-445   2013年8月
Although quasi-one-dimensional halogen-bridged complexes (MX chains) have been studied extensively, most of the MX chains reported are in a charge-density-wave (CDW) state (X⋯MII⋯XMIVX⋯). The first M(III) Mott-Hubbard (MH) complex was reported in ...
Tomohiko Ishii, Masahiro Kenmotsu, Kiyoshi Tsuge, Genta Sakane, Yoichi Sasaki, Masahiro Yamashita, Brian K. Breedlove
The DV-X Molecular-Orbital Calculation Method   333-357   2015年1月
© Springer International Publishing Switzerland 2015. We investigate the mechanism of strong fluorescence and phosphorescence observed in the binuclear copper complexes by means of a discrete variational (DV)-Xα molecular orbital calculation. Comp...

書籍等出版物

 
山下 正廣, 岡本 博
Springer   2013年   ISBN:9783709113165
JamesE. House (担当:共訳)
東京化学同人   2012年6月   ISBN:4807907891
JamesE. House (担当:共訳)
東京化学同人   2012年4月   ISBN:4807907883
金属錯体の現代物性化学
山下正廣・小島憲道 (担当:共著)
三共出版   2008年9月   
チャンピオンレコードを持つ金属錯体最前線
山下正廣、北川進 (担当:共編者)
化学同人   2006年   

競争的資金等の研究課題

 
次世代型高次機能性ナノ金属錯体の科学
科学研究費補助金
研究期間: 1982年4月 - 現在

社会貢献活動

 
出前授業
【その他】  2007年6月
福島成蹊高校で東北大学の紹介と研究講演を行った。
新しい光通信材料に利用期待:一次元鎖モット絶縁体Pd(III)錯体の合成に成功
【情報提供】  科学新聞  2008年9月5日
ハロゲン架橋Pd錯体のカウンターイオンに長鎖アルキル基を導入することにより化学圧力を使うことにより、世界で初めてPd(III)モット絶縁体状態の錯体を合成することに成功した。
東北大・山下教授らの論文、昨年第4期「最多アクセス」
【情報提供】  科学新聞  2008年4月18日
2007年に米国化学会誌Inorganic Chemistryに掲載された「伝導性単分子磁石」の論文が2007年第4期最多アクセス論文となった。
CREST研究成果から
【情報提供】  化学新聞  2008年1月18日
科学技術振興機構創造的研究CREST(JST)で行われた「量子スピン系ナノ分子磁石の創成」の研究成果が報道された。

その他

 
2008年10月   強相関電子系ナノワイヤー金属錯体のナノ・ヘテロ界面における新奇非線形現象の創製とデバイス化
強相関電子系ト電子格子系錯体を用いてナノ・ヘテロ界面を作成し、そこにおける新規な非線形現象を利用したデバイスを作成する。
2002年11月   分子性ナノ量子磁石の創製
新規な単一次元鎖量子磁石や単分子量子磁石を合成し、物性研究を行う。