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
Interpretation of generalized grating imaging

Koichi Iwata

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 25(9) 2244-2250, Sep, 2008 Peer-reviewed
Local structure formation in alkyl-imidazolium-based ionic liquids as revealed by linear and nonlinear Raman spectroscopy

Koichi Iwata, Hajime Okajima, Satyen Saha, Hiro-O Hamaguchi

ACCOUNTS OF CHEMICAL RESEARCH, 40(11) 1174-1181, Nov, 2007 Peer-reviewed
Picosecond time-resolved fluorescence study on solute-solvent interaction of 2-aminoquinoline in room-temperature ionic liquids: Aromaticity of imidazolium-based ionic liquids

Iwata Koichi, Kakita Minoru, Hamaguchi Hiro-o

JOURNAL OF PHYSICAL CHEMISTRY B, 111(18) 4914-4919, May 10, 2007 Peer-reviewed
Intra- and intermolecular vibrational energy transfer in tungsten carbonyl complexes W(CO)(5)(X) (X = CO, CS, CH3CN, and CD3CN)

Motohiro Banno, Koichi Iwata, Hiro-o Hamaguchi

JOURNAL OF CHEMICAL PHYSICS, 126(20) 204501, May, 2007 Peer-reviewed
Vibrational cooling process of S-1 trans-stilbene in ionic liquids observed with picosecond time-resolved Raman spectroscopy

Koichi Iwata, Kyousuke Yoshida, Yuta Takada, Hiro-o Hamaguchi

CHEMISTRY LETTERS, 36(4) 504-505, Apr, 2007 Peer-reviewed
Charge resonance character in the charge transfer state of bianthryls: Effect of symmetry breaking on time-resolved near-IR absorption spectra

T Takaya, S Saha, H Hamaguchi, M Sarkar, A Samanta, K Iwata

JOURNAL OF PHYSICAL CHEMISTRY A, 110(13) 4291-4295, Apr, 2006
Solvent-dependent intra- and intermolecular vibrational energy transfer of W(CO)(6) probed with sub-picosecond time-resolved infrared spectroscopy

M Banno, S Sato, K Iwata, H Hamaguchi

CHEMICAL PHYSICS LETTERS, 412(4-6) 464-469, Sep, 2005
Femtosecond Time-Resolved Near-Infrared Spectroscopy and "Loosely Bound Electrons"

IWATA Koichi

Bunko Kenkyu, 54(3),153(3) 153-162, 2005
Carrier dynamics in TiO2 and Pt/TiO2 powders observed by femtosecond time-resolved near-infrared spectroscopy at a spectral region of 0.9-1.5 mu m with the direct absorption method

K Iwata, T Takaya, H Hamaguchi, A Yamakata, TA Ishibashi, H Onishi, H Kuroda

JOURNAL OF PHYSICAL CHEMISTRY B, 108(52) 20233-20239, Dec, 2004
Femtosecond electron transfer dynamics of 9,9'-bianthryl in acetonitrile as studied by time-resolved near-infrared absorption spectroscopy

T Takaya, H Hamaguchi, H Kuroda, K Iwata

CHEMICAL PHYSICS LETTERS, 399(1-3) 210-214, Nov, 2004
Photochemical Bimolecular Reaction between Biphenyl and Carbon Tetrachloride: observed ultrafast kinetics and Diffusion-Controlled Reaction Model

IWATA KOICHI

Chemical Physics Letters, 347, 331, 2001
Microscopic Mechanism of the Solute-solvent Energy Dissipation Probed by Picosecond Time-resolved Raman Spectroscopy

J. Phys. Chem. A, 101(4), 632, 1997
Picosecond Time-resolved Raman Spectroscopy

IWATA Koichi, HAMAGUCHI Hiro-o

Bunko Kenkyu, 44(2), 61(2) 61-73, 1995
Time-Resolved Infrared Spectroscopy and Its Applications to Short-Lived Molecular Species.

KATO Chihiro, IWATA Koichi, HAMAGUCHI Hiro-o

Bunko Kenkyu, 40(5), 255(5) 255-274, 1991
Construction of a Versatile Microsecond Time-Resolved Infrared Spectrometer

Appl. Spectrosc., 44(9), 1431, 1990

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

Professional Memberships

Works

Research Projects

To the list screen