TURK, T and RESCH, U and FOX, MA and VOGLER, A (1992) CADMIUM BENZENETHIOLATE CLUSTERS OF VARIOUS SIZE - MOLECULAR-MODELS FOR METAL CHALCOGENIDE SEMICONDUCTORS. JOURNAL OF PHYSICAL CHEMISTRY, 96 (9). pp. 3818-3822. ISSN 0022-3654,
Full text not available from this repository.Abstract
The optical and electrochemical properties of three cadmium benzenethiolate clusters, Cd(SPh)4(2-), Cd4(SPh)10(2-), and Cd10S4(SPh)16(4-), are studied as function of the cluster size. The Cd(n) clusters (n = 1, 4, 10) which may represent molecular models for the semiconductor CdS show structured absorption spectra that are assigned to both ligand-to-metal charge-transfer (LMCT) and intraligand transitions. The absorption and emission bands of Cd10 are red-shifted compared to those of Cd1 and Cd4. The emission of the Cd(n) clusters (n = 4, 10) is ascribed to a LMCT transition as suggested by the short luminescence lifetimes and the red shift with increasing cluster size. Illumination of the Cd(n) clusters yields thianthrene, dibenzothiophene, and benzenethiol, the rate of photodegradation depending on the cluster size. Electrochemical studies of Cd(n) show that, with increasing cluster size, the oxidation potential is shifted negative while the reduction potential is shifted positive. Both Cd4 and Cd10 form charge-transfer complexes with methyl viologen. However, steady-state illumination of these clusters in the presence of methyl viologen does not result in the formation of the methyl viologen radical cation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEAR MAGNETIC-RESONANCE; SMALL CDS PARTICLES; COLLOIDAL SEMICONDUCTORS; EXCLUSION CHROMATOGRAPHY; SURFACTANT VESICLES; OPTICAL-PROPERTIES; ELECTRON-TRANSFER; PHOTOCHEMISTRY; COMPLEXES; PHOTOLUMINESCENCE; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54567 |
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