Publikation: Pyrene fluorescence in 2,7-di(4-phenylethynyl)pyrene-bridged bis(alkenylruthenium) complexes
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Complexes PyrDPE-RuCl and PyrDPE-Ruacac with a π-extended 2,7-di(4-phenylethynyl)pyrene linker undergo simultaneous one-electron oxidations of their {Ru}-styryl entities. The absence of an intervalence charge-transfer (IVCT) band at intermediate stages, where the mixed-valent, singly oxidized radical cation is present, and spin density confinement to the terminal styryl ruthenium site(s) are tokens of a lack of electronic coupling between the {Ru} entities across the π-conjugated linker. The close similarity of the linker-based π → π* bands in the complexes and the free ligand and their insensitivity towards oxidations at the terminal sites indicate that the central pyrenyl fluorophore is electronically decoupled from the electron-rich {Ru}-styryl termini. As a consequence, the complexes offer stable pyrene-based fluorescence emissions at 77 K, which are red-shifted from that of the linker.
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GOGESCH, Franciska S., Lea BAUER, Florian VOLLSTÄDT, Michael LINSEIS, Laura SENFT, Ivana IVANOVIĆ-BURMAZOVIĆ, Rainer F. WINTER, 2024. Pyrene fluorescence in 2,7-di(4-phenylethynyl)pyrene-bridged bis(alkenylruthenium) complexes. In: Dalton Transactions. Royal Society of Chemistry (RSC). 2024, 53(1), S. 251-259. ISSN 1477-9226. eISSN 1477-9234. Verfügbar unter: doi: 10.1039/d3dt03114dBibTex
@article{Gogesch2024Pyren-68881, year={2024}, doi={10.1039/d3dt03114d}, title={Pyrene fluorescence in 2,7-di(4-phenylethynyl)pyrene-bridged bis(alkenylruthenium) complexes}, number={1}, volume={53}, issn={1477-9226}, journal={Dalton Transactions}, pages={251--259}, author={Gogesch, Franciska S. and Bauer, Lea and Vollstädt, Florian and Linseis, Michael and Senft, Laura and Ivanović-Burmazović, Ivana and Winter, Rainer F.} }
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