A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in SolutionClick to copy article linkArticle link copied!
- Matthias DornMatthias DornDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Matthias Dorn
- Jens KalmbachJens KalmbachInstitute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, Tübingen 72076, GermanyMore by Jens Kalmbach
- Pit BodenPit BodenDepartment of Chemistry and Research Center Optimas, TU Kaiserslautern, Erwin-Schrödinger-Straße, Kaiserslautern 67663, GermanyMore by Pit Boden
- Ayla PäpckeAyla PäpckeInstitute for Physics and Department of Life, Light and Matter, University of Rostock, Rostock 18051, GermanyMore by Ayla Päpcke
- Sandra GómezSandra GómezInstitute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, Vienna 1090, AustriaMore by Sandra Gómez
- Christoph FörsterChristoph FörsterDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Christoph Förster
- Felix KuczelinisFelix KuczelinisDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Felix Kuczelinis
- Luca M. CarrellaLuca M. CarrellaDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Luca M. Carrella
- Laura A. BüldtLaura A. BüldtInstitute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, Tübingen 72076, GermanyMore by Laura A. Büldt
- Nicolas H. BingsNicolas H. BingsDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Nicolas H. Bings
- Eva RentschlerEva RentschlerDepartment of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Eva Rentschler
- Stefan LochbrunnerStefan LochbrunnerInstitute for Physics and Department of Life, Light and Matter, University of Rostock, Rostock 18051, GermanyMore by Stefan Lochbrunner
- Leticia GonzálezLeticia GonzálezInstitute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, Vienna 1090, AustriaMore by Leticia González
- Markus Gerhards*Markus Gerhards*[email protected]Department of Chemistry and Research Center Optimas, TU Kaiserslautern, Erwin-Schrödinger-Straße, Kaiserslautern 67663, GermanyMore by Markus Gerhards
- Michael Seitz*Michael Seitz*[email protected]Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, Tübingen 72076, GermanyMore by Michael Seitz
- Katja Heinze*Katja Heinze*[email protected]Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz 55128, GermanyMore by Katja Heinze
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.
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