Luminescence and Light-Driven Energy and Electron Transfer from an Exceptionally Long-Lived Excited State of a Non-Innocent Chromium(III) Complex

Treiling S, Wang C, Foerster C, Reichenauer F, Kalmbach J, Boden P, Harris JP, Carrella LM, Rentschler E, Resch-Genger U, Reber C, Seitz M, Gerhards M, Heinze K (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Angewandte Chemie International Edition Wiley

Book Volume: 58

Pages Range: 18075-18085

Journal Issue: 50

DOI: 10.1002/anie.201909325

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).

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Bundesanstalt für Materialforschung und -prüfung (BAM) DE Germany (DE) Eberhard Karls Universität Tübingen DE Germany (DE) Technische Universität Kaiserslautern DE Germany (DE) Université de Montréal CA Canada (CA)

How to cite

APA:

Treiling, S., Wang, C., Foerster, C., Reichenauer, F., Kalmbach, J., Boden, P.,... Heinze, K. (2019). Luminescence and Light-Driven Energy and Electron Transfer from an Exceptionally Long-Lived Excited State of a Non-Innocent Chromium(III) Complex. Angewandte Chemie International Edition, 58(50), 18075-18085. https://doi.org/10.1002/anie.201909325

MLA:

Treiling, Steffen, et al. "Luminescence and Light-Driven Energy and Electron Transfer from an Exceptionally Long-Lived Excited State of a Non-Innocent Chromium(III) Complex." Angewandte Chemie International Edition 58.50 (2019): 18075-18085.

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