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Authors: Treiling, Steffen
Wang, Cui
Förster, Christoph
Reichenauer, Florian
Kalmbach, Jens
Boden, Pit
Harris, Joe P.
Carrella, Luca M.
Rentschler, Eva
Resch-Genger, Ute
Reber, Christian
Seitz, Michael
Gerhards, Markus
Heinze, Katja
Title: Luminescence and light-driven energy and electron transfer from an exceptionally long-lived excited state of a non-innocent chromium(III) complex
Online publication date: 1-Jun-2022
Language: english
Abstract: Photoactive metal complexes employing Earth-abundant metal ions are a key to sustainable photophysical and photochemical applications. We exploit the effects of an inversion center and ligand non-innocence to tune the luminescence and photochemistry of the excited state of the [CrN6] chromophore [Cr(tpe)2]3+ with close to octahedral symmetry (tpe=1,1,1-tris(pyrid-2-yl)ethane). [Cr(tpe)2]3+ exhibits the longest luminescence lifetime (τ=4500 μs) reported up to date for a molecular polypyridyl chromium(III) complex together with a very high luminescence quantum yield of Φ=8.2 % at room temperature in fluid solution. Furthermore, the tpe ligands in [Cr(tpe)2]3+ are redox non-innocent, leading to reversible reductive chemistry. The excited state redox potential and lifetime of [Cr(tpe)2]3+ surpass those of the classical photosensitizer [Ru(bpy)3]2+ (bpy=2,2′-bipyridine) enabling energy transfer (to oxygen) and photoredox processes (with azulene and tri(n-butyl)amine).
DDC: 540 Chemie
540 Chemistry and allied sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
License: CC BY
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Journal: Angewandte Chemie : International edition
Pages or article number: 18075
Publisher: Wiley-VCH
Publisher place: Weinheim
Issue date: 2019
ISSN: 1521-3773
Publisher DOI: 10.1002/anie.201909325
Appears in collections:JGU-Publikationen

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