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http://dx.doi.org/10.18419/opus-4864
Autor(en): | Emele, Peter Meyer, Dirk U. Holl, Norbert Port, Helmut Wolf, Hans Christoph Würthner, Frank Bäuerle, Peter Effenberger, Franz |
Titel: | Dual fluorescence of 9-anthryl-substituted oligothiophenes in nonpolar environment |
Erscheinungsdatum: | 1994 |
Dokumentart: | Zeitschriftenartikel |
Erschienen in: | Chemical Physics 181 (1994), S. 417-424. URL http://dx.doi.org./10.1016/0301-0104(94)00007-7 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-44588 http://elib.uni-stuttgart.de/handle/11682/4881 http://dx.doi.org/10.18419/opus-4864 |
Zusammenfassung: | 9-Anthryl-oligothiophenes (9A-Tn, n = 1–4) have been studied in n-hexane solution between helium and room temperature using absorption, fluorescence emission and excitation spectra and time resolved fluorescence measurements. These compounds are reference systems for studies on intramolecular energy and charge transfer in donor/acceptor-substituted conjugated chain molecules. The absorption spectra show contribution of both substituents anthracene and oligothiophene, but no additional bands due to mixed electronic states. Dual fluorescence is observed at Tgreater-or-equal, slanted 120 K for the compounds 9A-Tn (n = 1–3), but not for 9A-T4. Time resolved spectroscopy reveals a dynamical coupling between the two emission components whose relative quantum yields are strongly temperature dependent. The occurrence of the dual fluorescence is explained by an intramolecular torsional motion between the two molecular subunits. |
Enthalten in den Sammlungen: | 08 Fakultät Mathematik und Physik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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