Koichi Iwata

(岩田耕一)

Profile Information

Affiliation: Professor, Faculty of Science, Department of Chemistry, Faculty of Science Department of Chemistry, Gakushuin University

Degree: (BLANK)(The University of Tokyo)

J-GLOBAL ID: 200901030161773730
researchmap Member ID: 1000255661

External link: https://www-cc.gakushuin.ac.jp/~20040130/index.htm

Research Interests

Research Areas

Nanotechnology/Materials / Basic physical chemistry /

Research History

Professor, Gakushuin University Faculty of Science, Department of Chemistry

Awards

Papers

Femtosecond Time-resolved Near-infrared Spectroscopy of Oligothiophenes and Polythiophene: Energy Location and Effective Conjugation Length of Their Low-lying Excited States

Shunnosuke Okino, Tomohisa Takaya, Koichi Iwata

CHEMISTRY LETTERS, 44(8) 1059-1061, Aug, 2015 Peer-reviewed
Rapid microstructure characterization of polymer thin films with 2D-array multifocus Raman microspectroscopy

Ashok Zachariah Samuel, Sohshi Yabumoto, Kenichi Kawamura, Koichi Iwata

ANALYST, 140(6) 1847-1851, 2015 Peer-reviewed
Viscosity Heterogeneity inside Lipid Bilayers of Single-Component Phosphatidylcholine Liposomes Observed with Picosecond Time-Resolved Fluorescence Spectroscopy

Yuki Nojima, Koichi Iwata

JOURNAL OF PHYSICAL CHEMISTRY B, 118(29) 8631-8641, Jul, 2014 Peer-reviewed
Relaxation Mechanism of beta-Carotene from S-2 (1B(u)(+)) State to Si (2A(g)(-)) State: Femtosecond Time-Resolved Near-IR Absorption and Stimulated Resonance Raman Studies in 900-1550 nm Region

Tomohisa Takaya, Koichi Iwata

JOURNAL OF PHYSICAL CHEMISTRY A, 118(23) 4071-4078, Jun, 2014 Peer-reviewed
Ultrafast bimolecular radical reaction between S1 p-terphenyl and carbon tetrachloride: mode-specific acceleration of vibrational dephasing in reactant molecule

Koichi Iwata

JOURNAL OF RAMAN SPECTROSCOPY, 39(11) 1512-1517, Nov, 2008 Peer-reviewed

Misc.

Control of Electron Flow Direction in Photoexcited Cycloplatinated Complex Containing Conjugated Polymer-Single-Walled Carbon Nanotube Hybrids

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(14) 3819-3824, Jul, 2018
Excited-State Dynamics of Pyrene Incorporated into Poly(substituted methylene)s: Effects of Dense Packing of Pyrenes on Excimer Formation

Tomohisa Takaya, Tatsuya Oda, Yuki Shibazaki, Yumiko Hayashi, Hiroaki Shimomoto, Eiji Ihara, Yukihide Ishibashi, Tsuyoshi Asahi, Koichi Iwata

MACROMOLECULES, 51(14) 5430-5439, Jul, 2018
The effect of regioisomerism on the photophysical properties of alkylated-naphthalene liquids

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(5) 2970-2975, Feb 7, 2018
Novel physical chemistry approaches in biophysical researches with advanced application of lasers: Detection and manipulation

Koichi Iwata, Masahide Terazima, Hiroshi Masuhara

Biochimica et Biophysica Acta - General Subjects, 1862(2) 335-357, Feb 1, 2018
Vibrational relaxation dynamics of b-carotene and its derivatives with substituents on terminal rings in electronically excited states as studied by femtosecond time-resolved stimulated Raman spectroscopy in the near-IR region

Tomohisa Takaya, Masato Anan, Koichi Iwata

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 20(5) 3320-3327, Feb, 2018

Presentations

““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
“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
“How to measure a Raman spectrum...?”

Taiwan Association of Raman Spectroscopy Summer Camp, Hsinchu, Taiwan, 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
“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
“Electron Relaxation in Ionic Liquid and LaInO₃:Pr³⁺ Observed with Picosecond to Femtosecond Time-resolved Spectroscopies”

11th Trombay Symposium on Radiation and Photochemistry (TSRP2012), Bhabha Atomic Research Centre, Mumbai, India, 2012
“Electron Solvation Process in Room-temperature Ionic Liquid Observed with Femtosecond Time-resolved Near-infrared Spectroscopy”

2nd International Workshop on Radiation Effects in Nuclear Technology, The University of Tokyo, Tokyo, Japan, 2012
“Characterizing heterogeneous mesostructures with vibrational relaxation kinetics”

23rd International Conference on Raman Spectroscopy (ICORS2012), Indian Institute of Science, Bangalore, India, 2012
“Lipid bilayer membranes and ionic liquids observed with fast time-resolved spectroscopy”

Department Seminar, Department of General and Physical Chemistry, Pech University, Hungary, 2012
“Interior of Lipid Bilayer Membrane Characterized with Time-resolved Spectroscopic Techniques”

SPEC 2012 “Shedding New Light on Disease”, Chiang Mai, Thailand, 2012
“Lipid Bilayer Membrane In Egg-PC Liposome Evaluated as Chemical Reaction Field”

14th Asian Chemical Congress (14ACC),Bangkok, Thailand, INV- S9-02, 2011
“Solvation environments in liposome lipid bilayers probed with advanced fluorescence and Raman spectroscopies”

Molecular Spectroscopy with Biological Context - Recent Advances, 38th FACSS (Federation of Analytical Chemistry and Spectroscopy Societies), Reno, Nevada, USA, 2011
“Characterizing photogenerated carrier in semiconductor materials with femtosecond time-resolved near-IR spectroscopy and picosecond time-resolved emission spectroscopy”

8th Korrea-Japan Fonteer Symposium on Photosciences (KJFP-2011), KokMing University, Seoul, Korea, 2011
“Characterizing lipid bilayer membrane as chemical reaction field with time-resolved Raman and fluorescence spectroscopy” (Keynote Lecture)

9th Australasian Conference on Vibrational Spectroscopy (ACOVS9), Victoria University, Wellington, New Zealand, 2011
“Fast processes in mesoscopic structures examined with time-resolved spectroscopies”

Ohokayama workshop on fundamental photochemical processes in condensed media, Tokyo Institute of Technology, Tokyo, Japan, 2010
“Tracing elementary processes in chemical reaction with time-resolved spectroscopy - TiO₂ and micelle”

Department Seminar, Department of Chemistry, University of Hong Kong, , Hong Kong, China, 2010
“How Electron Relaxes in Micellar Solution, Ionic Liquid, and TiO2 Photocatalyst: Femtosecond Time-resolved Near-infrared Study”

Advanced Spectroscopy and Imaging in Molecular Science, National Chiao Tung University, Hsinchu, Taiwan, 2010
“Attempts with Raman Spectroscopy for Examining Macromolecules and Lipid Bilayer Membranes”

XXIIth International Conference on Raman Spectroscopy (ICORS2010), Boston, MA, USA, MOF, 2010
“New Attempts with Raman Spectroscopy for Examining Macromolecules and Lipid Bilayer Membranes”

The International Chemical Congress of Pacific Basin Societies (Pacifichem2010), Honolulu, Hawaii, USA, 781, 2010
“Microscopic Solvation Environments and Macroscopic Properties: Loss of Correlation in Ionic Liquid”

Science of Inoic Liquids, Satellite Conference for COIL-3, Cairns, Australia, 2009
“Loss of correlation between microscopic solvation environments and macroscopic properties: Partially ordered structure in ionic liquids”

5th International Conference on Advanced Vibrational Spectroscopy (ICAVS-5), I23, Sebel Hotel, Melbourne, Australia, 2009
“Loose electrons in micellar solution and TiO₂ photocatalysts examined with femtosecond time-resolved near-IR spectroscopy”

The Second Asian Spectroscopy Conference (ASC09), Hoam Convention Center, Seoul National University, Seoul, Korea, 2009

Professional Memberships

Works

Research Projects

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