Kunkely, Horst and Vogler, Arnd (2002) Excited state behavior of uranyl complexes with salophen and oxine as chromophoric ligands. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 57 (3). pp. 301-304. ISSN 0932-0776
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The electronic spectra and the photochemistry of the uranyl complexes UO2 (salophen) and UO2 (oxinate)2 with H(2)salophen = N,N'-bis(salicylidene)-o-phenylenediamine and oxine = 8-hydroxyquinoline were studied. The excited state behavior of both complexes is determined by a low-energy salophen(2-)/oxinate(-) to U(VI) ligand-to-metal charge transfer (LMCT) state which is not luminescent but can be reactive. In the case of UO2 (oxinate)(2) the photolysis leads to the formation of free oxine with phi = 3.6 x 10(-3) at lambda(irr) = 366 nm in CHCl3. It is suggested that various redox processes with the participation of the solvent are involved in product formation. UO2 (salophen) is not light sensitive since the primary electron transfer is followed by recombination which is facilitated by the rigid UO2 (salophen) structure.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION-METAL COMPLEXES; PHOTOLUMINESCENCE; PHOTOCHEMISTRY; uranyl complexes; salen complexes; oxinate complexes |
| 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: | 09 Nov 2021 07:28 |
| Last Modified: | 09 Nov 2021 07:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40575 |
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