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Energy transfer and formation of long-lived \(^3\)MLCT states in multimetallic complexes with extended highly conjugated bis-terpyridyl ligands

Please always quote using this URN: urn:nbn:de:bvb:20-opus-191041
  • 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.show moreshow less

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Metadaten
Author: Maria Wächtler, Joachim Kübel, Kevin Barthelmes, Andreas Winter, Alexander Schmiedel, Torbjörn Pascher, Christoph Lambert, Ulrich S. Schubert, Benjamin Dietzek
URN:urn:nbn:de:bvb:20-opus-191041
Document Type:Journal article
Faculties:Fakultät für Chemie und Pharmazie / Institut für Organische Chemie
Language:English
Parent Title (English):Physical Chemistry Chemical Physics
Year of Completion:2016
Volume:18
Issue:4
Pagenumber:2350-2360
Source:Physical Chemistry Chemical Physics (2016) 18:4, S. 2350-2360. https://doi.org/10.1039/c5cp04447b
DOI:https://doi.org/10.1039/c5cp04447b
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 547 Organische Chemie
Tag:RU-(II) complexes; Ru(II)–Fe(II)–Ru(II) complex; bis-terpyridyl ligands; metal-to-ligand charge transfer (MLCT); multimetallic complexes; polypyridyl complexes
Release Date:2021/02/10
EU-Project number / Contract (GA) number:LaserLab Europe (LLC001917)
OpenAIRE:OpenAIRE
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung