title: Mechanisms of metal ion-coupled electron transfer.
abstract: Redox inactive metal ions acting as Lewis acids can control electron transfer from electron donors (D) to electron acceptors (A) by binding to radical anions of electron acceptors which act as Lewis bases. Such electron transfer is defined as metal ion-coupled electron transfer (MCET). Mechanisms of metal ion-coupled electron transfer are classified mainly into two pathways, i.e., metal ion binding to electron acceptors followed by electron transfer (MB/ET) and electron transfer followed by metal ion binding to the resulting radical anions of electron acceptors (ET/MB). In the former case, electron transfer and the stronger binding of metal ions to the radical anions occur in a concerted manner. Examples are shown in each case to clarify the factors to control MCET reactions in both thermal and photoinduced electron-transfer reactions including back electron-transfer reactions.
authors.affiliation: Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan. fukuzumi@chem.eng.osaka-u.ac.jp.
authors.forename: Shunichi
authors.initials: S
authors.lastname: Fukuzumi
authors.forename: Kei
authors.initials: K
authors.lastname: Ohkubo
authors.forename: Yuma
authors.initials: Y
authors.lastname: Morimoto
mesh_terms: D004579:Electron Transport; D008670:Metals / Q000032:analysis / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D011166:Porphyrins / Q000737:chemistry; D011809:Quinones / Q000737:chemistry
chemical_list: D008670:Metals; D011166:Porphyrins; D011809:Quinones; D010100:Oxygen