A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in Solution

Dorn M, Kalmbach J, Boden P, Paepcke A, Gomez S, Foerster C, Kuczelinis F, Carrella LM, Bueldt LA, Bings NH, Rentschler E, Lochbrunner S, Gonzalez L, Gerhards M, Seitz M, Heinze K (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Journal of the American Chemical Society American Chemical Society

Book Volume: 142

Pages Range: 7947-7955

Journal Issue: 17

DOI: 10.1021/jacs.0c02122

Abstract

Luminescence from Earth-abundant metal ions in solution at room temperature is a very challenging objective due to the intrinsically weak ligand field splitting of first-row transition metal ions, which leads to efficient nonradiative deactivation via metal-centered states. Only a handful of 3dn metal complexes (n ≠ 10) show sizable luminescence at room temperature. Luminescence in the near-infrared spectral region is even more difficult to achieve as further nonradiative pathways come into play. No Earth-abundant first-row transition metal complexes have displayed emission >1000 nm at room temperature in solution up to now. Here, we report the vanadium(III) complex mer-[V(ddpd)2][PF6]3 yielding phosphorescence around 1100 nm in valeronitrile glass at 77 K as well as at room temperature in acetonitrile with 1.8 × 10-4% quantum yield (ddpd = N,N′-dimethyl-N,N′-dipyridine-2-ylpyridine-2,6-diamine). In addition, mer-[V(ddpd)2][PF6]3 shows very strong blue fluorescence with 2% quantum yield in acetonitrile at room temperature. Our comprehensive study demonstrates that vanadium(III) complexes with d2 electron configuration constitute a new class of blue and NIR-II luminophores, which complement the classical established complexes of expensive precious metals and rare-earth elements.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Eberhard Karls Universität Tübingen DE Germany (DE) Technische Universität Kaiserslautern DE Germany (DE) Universität Rostock DE Germany (DE) Universität Wien / University of Vienna AT Austria (AT)

How to cite

APA:

Dorn, M., Kalmbach, J., Boden, P., Paepcke, A., Gomez, S., Foerster, C.,... Heinze, K. (2020). A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in Solution. Journal of the American Chemical Society, 142(17), 7947-7955. https://doi.org/10.1021/jacs.0c02122

MLA:

Dorn, Matthias, et al. "A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in Solution." Journal of the American Chemical Society 142.17 (2020): 7947-7955.

BibTeX: Download