Türk, Thomas and Vogler, Arnd and Fox, Marye Anne (1993) Molecular Models for Semiconductor Particles: Luminescence Studies of Several Inorganic Anionic Clusters. In: Photosensitive metal-organic systems : mechanistic principles and applications. Advances in chemistry series (238). AMER CHEMICAL SOC, WASHINGTON, pp. 233-241. ISBN 0-8412-2527-3
Full text not available from this repository.Abstract
In the transition region from a bulk semiconductor to a molecular cluster, the optical and photocatalytic properties of a semiconductor drastically change as the size of the crystallite is decreased Several inorganic cluster molecules with a well-defined particle size and structure, (that is, Zn4(Sph)10(2-), Cd4(sph)10(2-), Cd10S4(SPh)16(4-), and Zn4O(OAc)6) were synthesized and compared to the analogous mononuclear complexes Zn(SPh)4(2-) and Cd(Sph)4(2-). These clusters showed structured absorption spectra and a red-shift of their absorption edges with increasing crystallite size. The observed extinction coefficients suggest that the absorption bands can be best ascribed to ligand-to-metal charge-transfer (LMCT) transitions, which can be thought of as molecular cluster analogs of valence-to-conduction band transitions in bulk ZnS and CdS. Luminescence lifetimes and Stokes shifts provide further information about the nature of the optical transitions.
| Item Type: | Book Section |
|---|---|
| Uncontrolled Keywords: | SMALL CDS PARTICLES; COLLOIDAL SEMICONDUCTORS; CADMIUM-SULFIDE; EXCLUSION CHROMATOGRAPHY; PHOTOPHYSICAL PROPERTIES; SURFACTANT VESICLES; OPTICAL-PROPERTIES; SIZE; PHOTOCHEMISTRY; NAFION |
| 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: | Petra Gürster |
| Date Deposited: | 20 Jun 2024 04:12 |
| Last Modified: | 20 Jun 2024 04:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54163 |
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