Researcher Database

（Last updated : 2022-05-19 11:23:44）

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KOBAYASHI YOICHI

Department / Course College of Life Sciences Department of Applied Chemistry

Title / Position Associate Professor

Other Affiliations
1.	Graduate School of Life Sciences

Academic background
1.	～2011/03	Doctoral Program (2nd Semester) │ Department of Chemistry │ School of Science and Technology │ Kansei Gakuin University │ Completed Doctor of Philosophy
2.	～2007/03	Department of Chemistry │ School of Science and Technology │ Kansei Gakuin University │ Graduated
3.	～2009/03	Doctoral Program (1st Semester) │ Department of Chemistry │ School of Science and Technology │ Kansei Gakuin University │ Completed

Business career
1.	2017/04/01	Associate Professor │ Department of Applied Chemistry College of Life Sciences, │ Ritsumeikan University,
2.	2013/09/01 ～ 2017/03/31	Assistant Professor │ Department of Chemistry, College of Science and Engineering, │ Aoyama Gakuin University,
3.	2012/04/01 ～ 2013/08/31	JSPS Overseas Research Fellowship │ │ Japan Society for the Promotion of Science (JSPS),
4.	2011/04/01 ～ 2012/03/31	JSPS Research Fellowship for Young Scientists (PD) │ │ Japan Society for the Promotion of Science (JSPS),
5.	2010/04/01 ～ 2011/03/31	JSPS Research Fellowship for Young Scientists (DC) │ │ Japan Society for the Promotion of Science (JSPS),

Research activities
1.		Japanese Photochemistry Association
2.		Chemical Society of Japan
3.		Japan Society for Molecular Science

Subject of research
1.	Developments of Novel Photofunctional Materials
2.	Physical Chemistry of Photofunctional Materials

Research summary
Development of Novel Photofunctional Materials which Demonstrate Cooperative Responses of Multiple Molecules and Photons Cooperative responses of multiple photons and molecules are not only important for the realization of novel photoresponses beyond conventional one-photon reaction but also for the developments of novel photofunctional materials. For examples, photochromic compounds, which change their color from colorless to colored upon UV light irradiation such as sunlight, have been widely applied to industry such as ophthalmic lenses, arts, toys and so on. However, there are still also no report on a photochromic compound which are very sensitive to the intensity of sunlight. Our group aims for the development of these kinds of novel photochromic compounds, which responses are over one-photon reaction, from the view point of physical chemists.

Present specialized field
Nanostructural chemistry, Nanomaterials chemistry, Basic chemistry, Functional solid state chemistry, Structural/Functional materials (Keyword：Photochromism, Nanostructures, Nanoparticles, Two-photon, Photophysics, Photochemistry)

Books
1.	2022/04/01	Diradicaloids │ (Co-authored)
2.	2020/09/06	Photosynergetic Responses in Molecules and Molecular Aggregates │ (Co-authored)
3.	2017/06	Photon-Working Switches・“Photochromism of Pentaarylbiimidazoles and Phenoxyl-Imidazolyl Radical Complexes” │ ,pp.153-167 (Co-authored)

Papers
1.	2023/01	Substituent-Dependent Photoexcitation Processes of π-Stacked Ion Pairs. │ Chemistry - A European Journal │ ,pp.e202203957 (Co-authored)
2.	2022/11/15	π-Stacked Ion Pairs: Tightly Associated Charged Porphyrins in Ordered Arrangement Enabling Radical-Pair Formation │ Journal of the American Chemical Society │ (Co-authored)
3.	2022/11	Harnessing infrared solar energy with plasmonic energy upconversion │ NATURE SUSTAINABILITY │ (Co-authored)
4.	2022/07/01	Photochromism of colloidal ZnO nanocrystal powders under ambient conditions │ Photochemical & Photobiological Sciences │ (Co-authored)
5.	2021/12/20	Excited-state dynamics of dipyrrolyldiketone difluoroboron complexes │ Physical Chemistry Chemical Physics │ 24,pp.1685-1691 (Co-authored)
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Academic conference presentation
1.	2018/12/19	Electron Transfer from Higher Excited States of Noncovalently Bound Porphyrin-CdS/ZnS Core/Shell Nanocrystals Induced by Stepwise Two-Photon Absorption (10th Asian Photochemistry Conference)
2.	2018/12/18	Optical Properties and Photochromism of Water-Soluble Cu and Co Co-Doped ZnS Nanocrystals (10th Asian Photochemistry Conference)
3.	2018/12/17	Synthesis and Optical Properties of Perylene-Substituted Lophine Nanostructures (10th Asian Photochemistry Conference)
4.	2018/09/06	Stepwise two-photon induced electron transfer from higher excited states of porphyrin-coordinated CdS/ZnS core/shell nanocrystals (Annual Meeting on Photochemistry 2018)
5.	2018/05/21	Stepwise Two-Photon Induced Electron Transfer from Higher Excited States of Non-Covalently Bound Porphyrin-CdS/ZnS Core/Shell Nanocrystals (3rd Workshop on Photo-active materials with Cooperative and Synergetic　Responses - Nanosynergetics, International Associated Laboratory (LIA) between France and Japan)
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Grants-in-Aid for Scientific Research -KAKENHI-
1.	2015/04 ～ 2018/03	Development and Functionalization of Novel Up-Conversion Fast Photochromic Compounds
2.	2010/04 ～ 2012/03	Generation and Relaxation Dynamics of Multiexcitons of Semiconductor Quantum Dots

External Researcher ID
ORCID ID
0000-0003-3339-3755
Researcher ID
ABG-5310-2021