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
Year of first publication:	2019
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
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7060
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Angewandte Chemie : International edition 58 50
Pages or article number:	18075 18085
Publisher:	Wiley-VCH
Publisher place:	Weinheim
Issue date:	2019
ISSN:	1521-3773
Publisher DOI:	10.1002/anie.201909325
Appears in collections:	JGU-Publikationen