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Crucial Roles of a Pendant Imidazole Ligand of a Cobalt Porphyrin Complex in the Stoichiometric and Catalytic Reduction of Dioxygen
- Title
- Crucial Roles of a Pendant Imidazole Ligand of a Cobalt Porphyrin Complex in the Stoichiometric and Catalytic Reduction of Dioxygen
- Authors
- Yang, Jindou; Li, Ping; Li, Xialiang; Xie, Lisi; Wang, Ni; Lei, Haitao; Zhang, Chaochao; Zhang, Wei; Lee, Yong-Min; Zhang, Weiqiang; Cao, Rui; Fukuzumi, Shunichi; Nam, Wonwoo
- Ewha Authors
- 남원우; Shunichi Fukuzumi; 이용민
- SCOPUS Author ID
- 남원우; Shunichi Fukuzumi; 이용민
- Issue Date
- 2022
- Journal Title
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
- ISSN
- 1433-7851
1521-3773
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION vol. 61, no. 34
- Keywords
- Acid-Promoted Electron Transfer; Cobalt Porphyrin Complex; Pendant Imidazole Base; Reaction Mechanisms; Reduction of Dioxygen
- Publisher
- WILEY-V C H VERLAG GMBH
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- A cobalt porphyrin complex with a pendant imidazole base ([(L-1)Co-II]) is an efficient catalyst for the homogeneous catalytic two-electron reduction of dioxygen by 1,1 '-dimethylferrocene (Me(2)Fc) in the presence of triflic acid (HOTf), as compared with a cobalt porphyrin complex without a pendant imidazole base ([(L-2)Co-II]). The pendant imidazole ligand plays a crucial role not only to provide an imidazolinium proton for proton-coupled electron transfer (PCET) from [(L-1)Co-II] to O-2 in the presence of HOTf but also to facilitate electron transfer (ET) from [(L-1)Co-II] to O-2 in the absence of HOTf. The kinetics analysis and the detection of intermediates in the stoichiometric and catalytic reduction of O-2 have provided clues to clarify the crucial roles of the pendant imidazole ligand of [(L-1)Co-II] for the first time.
- DOI
- 10.1002/anie.202208143
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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