Abstract
Catalytic control of electron-transfer processes is described for a number of photo-induced and thermal electron-transfer reactions, including back electron transfer in the charge-separated state of artificial photosynthetic compounds. The intermolecular and intramolecular electron-transfer processes are accelerated by complexation of radical anions, produced in the electron transfer, with metal ions that act as Lewis acids. Quantitative measures to determine the Lewis acidity of a variety of metal ions are given in relation with the promoting effects of metal ions in the electron-transfer reactions. The mechanistic viability of metal ion catalysis in electron- transfer reactions is demonstrated by a variety of examples of both thermal and photochemical reactions that involve metal ion-promoted electron-transfer processes as the rate-determining steps, which are made possible to proceed by complexation of radical anions with metal ions.
| Original language | English |
|---|---|
| Pages (from-to) | 577-587 |
| Number of pages | 11 |
| Journal | Pure and Applied Chemistry |
| Volume | 75 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 May 2003 |
Bibliographical note
Funding Information:The authors gratefully acknowledges the contributions of their collaborators and coworkers mentioned in the references. The authors acknowledge continuous support of their study by a Grant-in-Aid from the Ministry of Education, Science, Culture, and Sports, Japan.