Kyushu University [Shinji Kanegawa (Assistant Professor) Institute for Materials Chemistry and Engineering, Department of Fundamental Organic Chemistry]

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Shinji Kanegawa
Assistant Professor
Department of Fundamental Organic Chemistry
Institute for Materials Chemistry and Engineering
Last modified date：2024.04.04

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Department of Chemistry
Graduate School of Sciences

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Department of Chemistry
School of Sciences

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1.	Sadhukhan, Pritam; Wu, Shu-Qi; Long, Jeremy Ian; Nakanishi, Takumi; Kanegawa, Shinji; Gao, Kaige; Yamamoto, Kaoru; Okajima, Hajime; Sakamoto, Akira; Baker, Michael L.; Kroll, Thomas; Sokaras, Dimosthenis; Okazawa, Atsushi; Kojima, Norimichi; Shiota, Yoshihito; Yoshizawa, Kazunari; Sato, Osamu, Manipulating electron redistribution to achieve electronic pyroelectricity in molecular [FeCo] crystals, NATURE COMMUNICATIONS, 10.1038/s41467-021-25041-4, 12, 1, 2021.08.
2.	Shu Qi Wu, Meijiao Liu, Kaige Gao, Shinji Kanegawa, Yusuke Horie, Genki Aoyama, Hajime Okajima, Akira Sakamoto, Michael L. Baker, Myron S. Huzan, Peter Bencok, Tsukasa Abe, Yoshihito Shiota, Kazunari Yoshizawa, Wenhuang Xu, Hui Zhong Kou, Osamu Sato, Macroscopic Polarization Change via Electron Transfer in a Valence Tautomeric Cobalt Complex, Nature communications, 10.1038/s41467-020-15988-1, 11, 1, 2020.12, Polarization change induced by directional electron transfer attracts considerable attention owing to its fast switching rate and potential light control. Here, we investigate electronic pyroelectricity in the crystal of a mononuclear complex, [Co(phendiox)(rac-cth)](ClO<sub>4</sub>)·0.5EtOH (1·0.5EtOH, H<sub>2</sub>phendiox = 9, 10-dihydroxyphenanthrene, rac-cth = racemic 5, 5, 7, 12, 12, 14-hexamethyl-1, 4, 8, 11-tetraazacyclotetradecane), which undergoes a two-step valence tautomerism (VT). Correspondingly, pyroelectric current exhibits double peaks in the same temperature domain with the polarization change consistent with the change in dipole moments during the VT process. Time-resolved Infrared (IR) spectroscopy shows that the photo-induced metastable state can be generated within 150 ps at 190 K. Such state can be trapped for tens of minutes at 7 K, showing that photo-induced polarization change can be realized in this system. These results directly demonstrate that a change in the molecular dipole moments induced by intramolecular electron transfer can introduce a macroscopic polarization change in VT compounds..
3.	Shinji Kanegawa, KANG SOONCHUL, Osamu Sato, Preparation and Valence Tautomeric Behavior of a Cobalt-Dioxolene Complex with a New TTF-functionalized Phenanthroline Ligand, CHEMISTRY LETTERS, 10.1246/cl.130118, 42, 7, 700-702, 2013.07.
4.	Liu, T; Zhang, YJ; Kanegawa, S; Sato, O, Photoinduced Metal-to-Metal Charge Transfer toward Single-Chain Magnet, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 10.1021/ja1027953, 132, 24, 8250, 2010.06.
5.	Shinji Kanegawa, Satoru Karasawa, Masataka Maeyama, Motohiro Nakano, and Noboru Koga, Crystal Design of Monometallic Single-Molecule Magnets Consisting of Cobalt-Aminoxyl Heterospins, Journal of the American Chemical Society, 10.1021/ja0767579, 130, 10, 3079-3094, 2008.03.