IWATA Koichi

J-GLOBAL         Last updated: Sep 17, 2018 at 15:58
IWATA Koichi
Gakushuin University
Faculty of Science, Department of Chemistry, Faculty of Science Department of Chemistry
Job title
(BLANK)(The University of Tokyo)

Research Areas


Academic & Professional Experience

Professor, Gakushuin University Faculty of Science, Department of Chemistry

Published Papers

Okino Shunnosuke, Takaya Tomohisa, Iwata Koichi
CHEMISTRY LETTERS   44(8) 1059-1061   Aug 2015   [Refereed]
Samuel Ashok Zachariah, Yabumoto Sohshi, Kawamura Kenichi, Iwata Koichi
ANALYST   140(6) 1847-1851   2015   [Refereed]
Nojima Yuki, Iwata Koichi
JOURNAL OF PHYSICAL CHEMISTRY B   118(29) 8631-8641   Jul 2014   [Refereed]


Tomohisa Takaya, Tatsuya Oda, Yuki Shibazaki, Yumiko Hayashi, Hiroaki Shimomoto, Eiji Ihara, Yukihide Ishibashi, Tsuyoshi Asahi, Koichi Iwata
Macromolecules   51 5430-5439   Jul 2018
© 2018 American Chemical Society. The excited-state dynamics of pyrene incorporated into poly(substituted methylene)s is investigated by picosecond time-resolved fluorescence spectroscopy and femtosecond time-resolved near-IR absorption spectrosco...
Wenjuan Xiong, Lili Du, Kin Cheung Lo, Haiting Shi, Tomohisa Takaya, Koichi Iwata, Wai Kin Chan, David Lee Phillips
Journal of Physical Chemistry Letters   9 3819-3824   Jul 2018
Copyright © 2018 American Chemical Society. Conjugated polymers incorporated with cycloplatinated complexes (P1-Pt and P2-Pt) were used as dispersants for single-walled carbon nanotubes (SWCNTs). Significant changes in the UV-vis absorption spectr...
B. Narayan, K. Nagura, T. Takaya, K. Iwata, A. Shinohara, H. Shinmori, H. Wang, Q. Li, X. Sun, H. Li, S. Ishihara, T. Nakanishi
Physical Chemistry Chemical Physics   20 2970-2975   Feb 2018
© 2018 the Owner Societies. Novel regioisomeric alkylated-naphthalene liquids were designed and synthesized. In the solvent-free liquid state, 1-alkyloxy regioisomers showed excimeric luminescence, whereas 2-alkyloxy analogues exhibited monomer-ri...
Tomohisa Takaya, Masato Anan, Koichi Iwata
Physical Chemistry Chemical Physics   20 3320-3327   Feb 2018
© 2018 the Owner Societies. The electronic and vibrational relaxation of carotenoids is one of the key processes in the protection of living cells as well as in the functions of proteins involved in photosynthesis. In this study, the electronic an...
Fengniu Lu, Naoki Kitamura, Tomohisa Takaya, Koichi Iwata, Takashi Nakanishi, Yuki Kurashige
Physical Chemistry Chemical Physics   20 3258-3264   Feb 2018
© 2018 the Owner Societies. We investigated the fluorescence properties of dialkoxyphenyl-pyrene molecules experimentally as well as theoretically. Our experiments confirmed fluorescence solvatochromism in 2,5-dimethoxyphenyl-pyrene and, in contra...

Conference Activities & Talks

““Loose Electrons” Examined with Femtosecond Time-Resolved Near-Infrared Spsectroscopy - Solvated Electron and TiO2 Single Crystals”
12th Trombay Symposium on Radiation and Photochemistry (TSRP-2014), IT-15, Bhabha Atomic Research Centre, Mumbai, India   2014   
“Photocarrier Dynamics in TiO2 Single Crystals Studied with Femtosecond Time-resolved Near-infrared Spectroscopy”
2013 Korea - Japan Symposium on Frontier Photoscience (KJFP-2013), Invited Lecture 50, Hoam Faculty House, Seoul National University, Seoul , Korea   2013   
“Basic Processes in Chemical Reactions Examined with Time-resolved Vibrational Spectroscopy”
Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS7), PL-4(Plenary Lecture), Kobe Convention Center, Kobe, Japan   2013   
“How to measure a Raman spectrum...?”
Taiwan Association of Raman Spectroscopy Summer Camp, Hsinchu, Taiwan   2013   
“Basic processes of chemical reactions studied with picosecond time-resolved Raman spectroscopy and femtosecond time-resolved near-IR spectroscopy”
The First Taiwan International Symposium on Raman Spectroscopy, IL-2, National Chiao Tung University, Hsinchu, Taiwan   2013   

Association Memberships



Observation of primary process of photochemical reaction between biphenyl and carbon tetra chloride with time-resolved fluorescence spectroscopy
1997 - 1998
Precise measurement of femtosecond fluorescence behavior of biphenyl
1998 - 1999
Excited state stracture and relaxation pathway in EDA molecules by time-resolved infrared/Raman spectroscopic measurements

Research Grants & Projects

time-resolved spectroscopy
chemical reactions in solution