論文

2017年7月

Crystalline salts of metal phthalocyanine radical anions [M(PC center dot 3-)](center dot-) (M = Cu-II, Pb-II, (VO)-O-IV, (SnCl2)-Cl-IV) with cryptand(Na+) cations: structure, optical and magnetic propertiest

NEW JOURNAL OF CHEMISTRY
  • Dmitri V. Konarev
  • Maxim A. Faraonov
  • Alexey V. Kuzmin
  • Salavat S. Khasanov
  • Yoshiaki Nakano
  • Semen I. Norko
  • Mikhail S. Batov
  • Akihiro Otsuka
  • Hideki Yamochi
  • Gunzi Saito
  • Rimma N. Lyubovskaya
  • 全て表示

41
14
開始ページ
6866
終了ページ
6874
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1039/c7nj00530j
出版者・発行元
ROYAL SOC CHEMISTRY

Radical anion salts of metal phthalocyanines {cryptand[2,2,2](Na+)}[M(Pc center dot 3-)](center dot-)center dot C6H4Cl2 (M = Cu-II (1), Pb-II (2), (VO)-O-IV (3) and (SnCl2)-Cl-IV (4)) and {cryptand[2,2,1](Na+)}[(SnCl2)-Cl-IV(Pc center dot 3-)](center dot-)center dot C6H4Cl2 (5) have been obtained as single crystals. Phthalocyanine planes form channels to accommodate the cryptand[2,2,2](Na+) cations and solvent C6H4Cl2 molecules in 1-3. Nearly square phthalocyanine layers are formed in salts 4 and 5, which are parallel to the ac plane and have an effective pp interaction between the Pc center dot 3- macrocycles. The using of smaller cryptand[2,2,1](Na+) cations in 5, instead of larger cryptand[2,2,2](Na+) cations in 4, allows one to obtain more closely packed Pc layers. Reduction in the salts was centered on the Pc macrocycles, providing alternation of the C-N (imine) bonds in Pc due to partial loss of aromaticity. New bands were also observed in the NIR spectra at 9461006 nm and the Soret and Q-bands were essentially blue-shifted in the spectra of the salts. The [CuII(Pc center dot 3-)](center dot)- and [(VO)-O-IV(Pc center dot 3-)](center dot-) radical anions contain paramagnetic Cu-II and (VO)-O-IV centers and the Pc center dot 3- radical trianions, both having a S = 1/2 spin state. These radical anions were nearly isolated in the salts. Weak antiferromagnetic coupling with a Weiss temperature (theta) of -2 K was observed in 1. The magnetic behavior of 3 was described by a modified singlettriplet model with a ferromagnetic exchange coupling of J/kB = 7.7 K within [(VO)-O-IV(Pc center dot 3-)]center dot- and theta = -1.3 K. The stronger antiferromagnetic coupling with a Weiss temperature of theta = -64 K was observed in 4 and was accompanied by the decrease of molar magnetic susceptibility below 35 K due to antiferromagnetic ordering of spins. The magnetic behavior of 4 was described using the Heisenberg model for quasi-square two-dimensional antiferromagnetic coupling between spins with an exchange interaction of J/kB = -18 K.

リンク情報
DOI
https://doi.org/10.1039/c7nj00530j
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000405276100094&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85023184076&origin=inward
ID情報
  • DOI : 10.1039/c7nj00530j
  • ISSN : 1144-0546
  • eISSN : 1369-9261
  • SCOPUS ID : 85023184076
  • Web of Science ID : WOS:000405276100094

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