Energy transfer and formation of long-lived \(^3\)MLCT states in multimetallic complexes with extended highly conjugated bis-terpyridyl ligands
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- Multimetallic complexes with extended and highly conjugated bis-2,2':6',2''-terpyridyl bridging ligands, which present building blocks for coordination polymers, are investigated with respect to their ability to act as light-harvesting antennae. The investigated species combine Ru(II)- with Os(II)- and Fe(II)-terpyridyl chromophores, the latter acting as energy sinks. Due to the extended conjugated system the ligands are able to prolong the lifetime of the \(^3\)MLCT states compared to unsubstituted terpyridyl species by delocalization andMultimetallic complexes with extended and highly conjugated bis-2,2':6',2''-terpyridyl bridging ligands, which present building blocks for coordination polymers, are investigated with respect to their ability to act as light-harvesting antennae. The investigated species combine Ru(II)- with Os(II)- and Fe(II)-terpyridyl chromophores, the latter acting as energy sinks. Due to the extended conjugated system the ligands are able to prolong the lifetime of the \(^3\)MLCT states compared to unsubstituted terpyridyl species by delocalization and energetic stabilization of the \(^3\)MLCT states. This concept is applied for the first time to Fe(II) terpyridyl species and results in an exceptionally long lifetime of 23 ps for the Fe(II) \(^3\)MLCT state. While partial energy (>80%) transfer is observed between the Ru(II) and Fe(II) centers with a time-constant of 15 ps, excitation energy is transferred completely from the Ru(II) to the Os(II) center within the first 200 fs after excitation.…
Autor(en): | Maria Wächtler, Joachim Kübel, Kevin Barthelmes, Andreas Winter, Alexander Schmiedel, Torbjörn Pascher, Christoph Lambert, Ulrich S. Schubert, Benjamin Dietzek |
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URN: | urn:nbn:de:bvb:20-opus-191041 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Organische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Physical Chemistry Chemical Physics |
Erscheinungsjahr: | 2016 |
Band / Jahrgang: | 18 |
Heft / Ausgabe: | 4 |
Seitenangabe: | 2350-2360 |
Originalveröffentlichung / Quelle: | Physical Chemistry Chemical Physics (2016) 18:4, S. 2350-2360. https://doi.org/10.1039/c5cp04447b |
DOI: | https://doi.org/10.1039/c5cp04447b |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 547 Organische Chemie |
Freie Schlagwort(e): | RU-(II) complexes; Ru(II)–Fe(II)–Ru(II) complex; bis-terpyridyl ligands; metal-to-ligand charge transfer (MLCT); multimetallic complexes; polypyridyl complexes |
Datum der Freischaltung: | 10.02.2021 |
EU-Projektnummer / Contract (GA) number: | LaserLab Europe (LLC001917) |
OpenAIRE: | OpenAIRE |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |