Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-6255
Authors: | Moll, Johannes Wang, Cui Päpcke, Ayla Förster, Christoph Resch-Genger, Ute Lochbrunner, Stefan Heinze, Katja |
Title: | Green-light activation of push–pull ruthenium(II) complexes |
Online publication date: | 9-Aug-2021 |
Year of first publication: | 2020 |
Language: | english |
Abstract: | Synthesis, characterization, electrochemistry, and photophysics of homo- and heteroleptic ruthenium(II) complexes [Ru(cpmp)2]2+ (22+) and [Ru(cpmp)(ddpd)]2+ (32+) bearing the tridentate ligands 6,2’’-carboxypyridyl-2,2’-methylamine-pyridyl-pyridine (cpmp) and N,N’-dimethyl-N,N’-dipyridin-2-ylpyridine-2,6-diamine (ddpd) are reported. The complexes possess one (32+) or two (22+) electron-deficient dipyridyl ketone fragments as electron-accepting sites enabling intraligand charge transfer (ILCT), ligand-to-ligand charge transfer (LL'CT) and low-energy metal-to-ligand charge transfer (MLCT) absorptions. The latter peak around 544 nm (green light). Complex 22+ shows 3MLCT phosphorescence in the red to near-infrared spectral region at room temperature in deaerated acetonitrile solution with an emission quantum yield of 1.3 % and a 3MLCT lifetime of 477 ns, whereas 32+ is much less luminescent. This different behavior is ascribed to the energy gap law and the shape of the parasitic excited 3MC state potential energy surface. This study highlights the importance of the excited-state energies and geometries for the actual excited-state dynamics. Aromatic and aliphatic amines reductively quench the excited state of 22+ paving the way to photocatalytic applications using low-energy green light as exemplified with the green-light-sensitized thiol–ene click reaction. |
DDC: | 540 Chemie 540 Chemistry and allied sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-6255 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Chemistry - a European journal 26 30 |
Pages or article number: | 6820 6832 |
Publisher: | Wiley-VCH |
Publisher place: | Weinheim |
Issue date: | 2020 |
ISSN: | 1521-3765 |
Publisher URL: | https://doi.org/10.1002/chem.202000871 |
Publisher DOI: | 10.1002/chem.202000871 |
Appears in collections: | JGU-Publikationen |
Files in This Item:
File | Description | Size | Format | ||
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moll_johannnes-green-light_ac-20210804145931073.pdf | 1.85 MB | Adobe PDF | View/Open |