Titelbild: Luminescence and Light‐Driven Energy and Electron Transfer from an Exceptionally Long‐Lived Excited State of a Non‐Innocent Chromium(III) Complex (Angew. Chem. 50/2019)

Strongly Red-Emissive Molecular Ruby [Cr(bpmp)2]3+ Surpasses [Ru(bpy)3]2+

Gaining chemical control over the thermodynamics and kinetics of photoexcited states is paramount to an efficient and sustainable utilization of photoactive transition metal complexes in a plethora of technologies. In contrast to energies of charge transfer states described by spatially separated orbitals, the energies of spin-flip states cannot straightforwardly be predicted as Pauli repulsion and the nephelauxetic effect play key roles. Guided by multireference quantum chemical calculations, we report a novel highly luminescent spin-flip emitter with a quantum chemically predicted blue-shifted luminescence. The spin-flip emission band of the chromium complex [Cr(bpmp)2]3+ (bpmp = 2,6-bis(…

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

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, …

CCDC 1876390: Experimental Crystal Structure Determination

Related Article: Steffen Treiling, Cui Wang, Christoph Fçrster, Florian Reichenauer, Jens Kalmbach, Pit Boden, Joe P. Harris, Luca M. Carrella, Eva Rentschler, Ute Resch-Genger, Christian Reber, Michael Seitz, Markus Gerhards, and Katja Heinze|2019|Angew.Chem.,Int.Ed.|58|18075|doi:10.1002/anie.201909325

CCDC 1989536: Experimental Crystal Structure Determination

Related Article: Florian Reichenauer, Cui Wang, Christoph Förster, Pit Boden, Naz Ugur, Ricardo Báez-Cruz, Jens Kalmbach, Luca M. Carrella, Eva Rentschler, Charusheela Ramanan, Gereon Niedner-Schatteburg, Markus Gerhards, Michael Seitz, Ute Resch-Genger, Katja Heinze|2021|J.Am.Chem.Soc.|143|11843|doi:10.1021/jacs.1c05971

CCDC 2083757: Experimental Crystal Structure Determination

Related Article: Florian Reichenauer, Cui Wang, Christoph Förster, Pit Boden, Naz Ugur, Ricardo Báez-Cruz, Jens Kalmbach, Luca M. Carrella, Eva Rentschler, Charusheela Ramanan, Gereon Niedner-Schatteburg, Markus Gerhards, Michael Seitz, Ute Resch-Genger, Katja Heinze|2021|J.Am.Chem.Soc.|143|11843|doi:10.1021/jacs.1c05971

CCDC 1989537: Experimental Crystal Structure Determination

Related Article: Florian Reichenauer, Cui Wang, Christoph Förster, Pit Boden, Naz Ugur, Ricardo Báez-Cruz, Jens Kalmbach, Luca M. Carrella, Eva Rentschler, Charusheela Ramanan, Gereon Niedner-Schatteburg, Markus Gerhards, Michael Seitz, Ute Resch-Genger, Katja Heinze|2021|J.Am.Chem.Soc.|143|11843|doi:10.1021/jacs.1c05971

CCDC 1876389: Experimental Crystal Structure Determination

Related Article: Steffen Treiling, Cui Wang, Christoph Fçrster, Florian Reichenauer, Jens Kalmbach, Pit Boden, Joe P. Harris, Luca M. Carrella, Eva Rentschler, Ute Resch-Genger, Christian Reber, Michael Seitz, Markus Gerhards, and Katja Heinze|2019|Angew.Chem.,Int.Ed.|58|18075|doi:10.1002/anie.201909325