Billing, Roland and Vogler, Arnd (1997) Optical and photoinduced electron transfer in tris(ethylenediamine)cobalt(III)-cyanometallate ion pairs. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 103 (3). pp. 239-247. ISSN 1010-6030
Full text not available from this repository.Abstract
The ion pairs {[Co(en)(3)](3+); [M(CN)(x)](4-)}, where M=Fe, Ru, Os (x=6) and M=Mo, W (x=8), and {[Co(en)(3)](3+); [Mn(CN)(5)NO](3-)}, in aqueous solution show up ion pair charge-transfer (IPCT) transitions in the visible and near-ultraviolet spectral regions. On excitation of the IPCT transitions (lambda(irr)=405 nm), trinuclear complexes trans-{(en)(2)Co[NC-M(CN)((x-1))](2)](5-) are formed subsequent to an optical electron-transfer step with quantum yields close to unity. Excitation of the longest-wavelength ligand-field transition (lambda(irr)=510 nm) of ion paired [Co(en)(3)](3+) results in a photoinduced electron-transfer reaction leading to the formation of binuclear pentacoordinate [(en)(2)Co-NC-M(CN)(5)](-) (M=Fe, Ru, Os) and trinuclear hexacoordinate trans- {(en)(2)Co[NC-M(CN)(7)](2)}(5-) (M= Mo, W) complexes. The redox-reactive excited state of [Co(en)(3)](3+) has a lifetime shorter than 3 ns and is tentatively assigned to the T-5(2g) ligand-field excited state. (C) 1997 Elsevier Science S.A.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTERVALENCE EXCITATION; COMPLEXES; PHOTOCHEMISTRY; AMINE; STATE; photo-redox; cobalt(III); cyanometallate; five-coordinate complex; ion pair |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Arnd Vogler |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 May 2023 10:50 |
| Last Modified: | 11 May 2023 10:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51006 |
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