Ultrafast Charge-Transfer Dynamics in a Visible-Light-Excited Iridium(III) Terpyridine 2-Phenylpyridine Complex Studied by Femtosecond X-ray Absorption Spectroscopy

Ken-ichi Yamanaka,Kosuke Sato,Shunsuke Sato,Shunsuke Nozawa,Sunghee Lee,Ryo Fukaya,Hironobu Fukuzawa,Daehyun You,Shu Saito,Tsukasa Takanashi,Tetsuo Katayama,Tadashi Togashi,Takamasa Nonaka,Kazuhiko Dohmae, Shin-ichi Adachi,Kiyoshi Ueda,Makina Yabashi,Takeshi Morikawa,Ryoji Asahi

Journal of Photochemistry and Photobiology A: Chemistry（2022）

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摘要

Femtosecond X-ray absorption study of [Ir(tpy)(ppy)Cl]+ in acetonitrile under metal-to-ligand-charge-transfer (MLCT) excitation revealed that the structural change around Ir atom occurs along with intersystem crossing from 1MLCT to hot 3MLCT (114 fs), and subsequent internal conversion to relaxed 3MLCT mainly occurs not around the Ir atom but at the ligand such as the tpy.

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关键词

CO2-reduction photocatalyst,Iridium complex,Metal-to-ligand-charge-transfer state,Intersystem crossing,Femtosecond X-ray absorption spectroscopy

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