Oppelt, Kerstin and Egbe, Daniel. A. M. and Monkowius, Uwe and List, Manuela and Zabel, Manfred and Sariciftci, Niyazi S. and Knoer, Guenther (2011) Luminescence and spectroscopic studies of organometallic rhodium and rhenium multichromophore systems carrying polypyridyl acceptor sites and phenylethynyl antenna subunits. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 696 (10). pp. 2252-2258. ISSN 0022-328X,
Full text not available from this repository. (Request a copy)Abstract
The synthesis, structure, photophysics, and spectroscopic characterization of two novel organometallic rhodium and rhenium multichromophore photosensitizers carrying a central 2,2'-bipyridyl acceptor moiety are reported. Due to the presence of rigid phenylethynyl substituents in their 5,5'-position acting as intramolecular antenna groups, these compounds display perturbed excited state properties and a modified luminescence behaviour compared to the unsubstituted parent systems. The rhodium derivative is characterized by a weak blue-green intraligand (IL) phosphorescence occurring only at low temperatures. In the rhenium complex both a blue-green ligand-based luminescence and a red phosphorescence of metal-to-ligand charge transfer (MLCT) origin is observed at room temperature in solution. In rigid 77 K matrix the lowest-lying excited state levels approximate in energy and a structured luminescence band occurs which is ascribed to a ligand phosphorescence with admixed MLCT character. (C) 2010 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EFFECTIVE CORE POTENTIALS; MOLECULAR-ORBITAL METHODS; PI-CONJUGATED POLYMERS; LIGAND CHARGE-TRANSFER; GAUSSIAN-TYPE BASIS; CRYSTAL-STRUCTURES; 1,2-DIIMINETRICARBONYLRHENIUM(I)CHLORIDE COMPLEXES; ELECTRONIC-SPECTRA; ORGANIC-MOLECULES; PHOTOPHYSICS; Electronic spectra; Luminescence; Rhenium complexes; Rhodium complexes; Multichromophore systems; Phenyleneethynylene ligands |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Central Analytical Services |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Jun 2020 14:25 |
| Last Modified: | 15 Jun 2020 14:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20824 |
Actions (login required)
 |
View Item |
