Ru(II)(bpy)3-Cob(II)yrinat – ein binuklearer Photoredox-Photokatalysator. Synthese und Anwendung in der organischen Chemie
| Autor: | Beat Steiger, Eugen Eichenberger, Lorenz Walder |
|---|---|
| Jazyk: | German<br />English<br />French |
| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | CHIMIA, Vol 45, Iss 1-2 (1991) |
| Druh dokumentu: | article |
| ISSN: | 0009-4293 2673-2424 |
| Popis: | The synthesis of the binuclear 'RuII-CoII' complex (5a) is described. Its two subunits consist of derivatives of RuII(bpy)3++ and cob(II)yrinate. 5a undergoes 7 one-electron redox processes in the potential range + 1.5 to–1.8 V (vs. SCE). Luminescence from the RuII(bpy)3? subunit is effectively reduced, however, the quenching mechanism has not been elucidated. Upon visible light irradiation and in presence of triethanolamine (TEOA), the formation of 'RuII-CoI' is observed. Using TEOA as an electron donor, the catalyst consumes formally two quanta of visible light to promote the endergonic reduction of an aliphatic alkyl halide. 5a has been used as a 'photoredox-photocatalyst' in the radical-type cyclisation of methyl 1-(3-bromopropyl)-4-oxocyclohexa-2,5-diene-1-carboxylate (8) to the corresponding indene derivative (9). |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|