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
Experimental and theoretical investigation of fluorescence solvatochromism of dialkoxyphenyl-pyrene molecules

Fengniu Lu, Naoki Kitamura, Tomohisa Takaya, Koichi Iwata, Takashi Nakanishi, Yuki Kurashige

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 20(5) 3258-3264, Feb, 2018
The impact of metal complex lipids on viscosity and curvature of hybrid liposomes

Ryo Ohtani, Tsukasa Tokita, Tomohisa Takaya, Koichi Iwata, Masanao Kinoshita, Nobuaki Matsumori, Masaaki Nakamura, Leonard F. Lindoy, Shinya Hayami

CHEMICAL COMMUNICATIONS, 53(99) 13249-13252, Dec, 2017
NIR luminescent heterodinuclear [Zn-II Ln(III)] complexes: Synthesis, crystal structures and photophysical properties

Nidhi Dwivedi, Sumit K. Panja, Abhineet Verma, Tomohisa Takaya, Koichi Iwata, Sailaja S. Sunkari, Satyen Saha

JOURNAL OF LUMINESCENCE, 192 156-165, Dec, 2017
A Guide to Design Functional Molecular Liquids with Tailorable Properties using Pyrene-Fluorescence as a Probe

Fengniu Lu, Tomohisa Takaya, Koichi Iwata, Izuru Kawamura, Akinori Saeki, Masashi Ishii, Kazuhiko Nagura, Takashi Nakanishi

SCIENTIFIC REPORTS, 7, Jun, 2017
Development of a femtosecond time-resolved near-IR multiplex stimulated Raman spectrometer in resonance with transitions in the 900-1550 nm region

Tomohisa Takaya, Koichi Iwata

ANALYST, 141(14) 4283-4292, 2016
Electron Density Dependent Composition of the Solvation Shell of Phenol Derivatives in Binary Solutions of Water and Ethanol

Sandor Kunsagi-Mate, Koichi Iwata

JOURNAL OF SOLUTION CHEMISTRY, 42(1) 165-171, Jan, 2013
Nanosecond Time-resolved Infrared Spectra and Structure of the Charge-transfer State of 9,9 '-Bianthryl in Acetonitrile

Nobuyuki Asami, Sohshi Yabumoto, Shinsuke Shigeto, Tomohisa Takaya, Hiro-o Hamaguchi, Koichi Iwata

CHEMISTRY LETTERS, 41(6) 654-656, Jun, 2012
Local structures in ionic liquids probed and characterized by microscopic thermal diffusion monitored with picosecond time-resolved Raman spectroscopy

Kyousuke Yoshida, Koichi Iwata, Yoshio Nishiyama, Yoshifumi Kimura, Hiro-o Hamaguchi

JOURNAL OF CHEMICAL PHYSICS, 136(10) 104504-1 - 104504-8, Mar, 2012
Two-step photoionization of trans-stilbene in acetonitrile via an ion-pair precursor studied with picosecond time-resolved absorption and Raman spectroscopies

Hiroko Miki, Kyousuke Yoshida, Chieko Kawate, Rintaro Shimada, Tomohisa Takaya, Koichi Iwata, Hiro-o Hamaguchi

CHEMICAL PHYSICS LETTERS, 527 27-30, Feb, 2012
The role of the solvation shell decomposition of alkali metal ions in their selective complexation by resorcinarene and its cavitand

Yin Li, Zsolt Csok, Laszlo Kollar, Koichi Iwata, Erzsebet Szasz, Sandor Kunsagi-Mate

SUPRAMOLECULAR CHEMISTRY, 24(6) 374-378, 2012
Lipid Bilayer Membrane of Egg-PC Liposome Evaluated as Chemical Reaction Field with Picosecond Time-Resolved Fluorescence Spectroscopy

Yuki Nojima, Koichi Iwata

CHEMISTRY-AN ASIAN JOURNAL, 6(7) 1817-1824, Jul, 2011
Role of the Conformational Freedom of the Skeleton in the Complex Formation Ability of Resorcinarene Derivatives toward a Neutral Phenol Guest

Sandor Kunsagi-Mate, Zsolt Csok, Koichi Iwata, Erzsebet Szasz, Laszlo Kollar

JOURNAL OF PHYSICAL CHEMISTRY B, 115(13) 3339-3343, Apr, 2011
Two Different Charge Transfer States of Photoexcited 9,9 '-Bianthryl in Polar and Nonpolar Solvents Characterized by Nanosecond Time-Resolved Near-IR Spectroscopy in the 4500-10 500 cm(-1) Region

Nobuyuki Asami, Tomohisa Takaya, Soshi Yabumoto, Shinsuke Shigeto, Hiro-o Hamaguchi, Koichi Iwata

JOURNAL OF PHYSICAL CHEMISTRY A, 114(22) 6351-6355, Jun, 2010
Effect of cluster formation of solvent molecules on the preferential solvatation of anthracene in binary alcoholic solutions

Sandor Kunsagi-Mate, Koichi Iwata

CHEMICAL PHYSICS LETTERS, 473(4-6) 284-287, May, 2009
Intermolecular Interaction between W(CO)(6) and Alkane Molecules Probed by Ultrafast Vibrational Energy Relaxation: Anomalously Strong Interaction between W(CO)(6) and Decane

Motohiro Banno, Koichi Iwata, Hiro-o Hamaguchi

JOURNAL OF PHYSICAL CHEMISTRY A, 113(6) 1007-1011, Feb, 2009
Femtosecond time-resolved absorption anisotropy spectroscopy on 9,9(')-bianthryl: Detection of partial intramolecular charge transfer in polar and nonpolar solvents

Tomohisa Takaya, Hiro-o Hamaguchi, Koichi Iwata

JOURNAL OF CHEMICAL PHYSICS, 130(1) 014501-1-014501-9, Jan, 2009
Effects of pump and probe light field on picosecond time-resolved Raman spectra of S₁ trans-stilbene. Disagreement between Stokes-and anti-Stokes scattering fregnencies

IWATA KOICHI

Bulletin of the Chemical Society of Japan, 75, 1075, 2002
Microsoopic Mechamism of the Solute-solvent Energy Dissipation Probed by Picosecond Time-rsolved Raman Spectroscopy

IWATA KOICHI

Journal of Physical Chemistry, A, 101 632, 1997
Construction of a Transform-limited Picosecond Time-resolved Raman Spectrometer

IWATA KOICHI

Reniew of Scientific Instrnments, 64 2140, 1993
CONSTRUCTION OF A VERSATILE MICROSECOND TIME-RESOLVED INFRARED SPECTROMETER

K IWATA, H HAMAGUCHI

APPLIED SPECTROSCOPY, 44(9) 1431-1437, Nov, 1990

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

Professional Memberships

Works

Research Projects

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