1001003-94-6Relevant articles and documents
A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in Solution
Büldt, Laura A.,Bings, Nicolas H.,Boden, Pit,Carrella, Luca M.,Dorn, Matthias,F?rster, Christoph,Gómez, Sandra,Gerhards, Markus,González, Leticia,Heinze, Katja,Kalmbach, Jens,Kuczelinis, Felix,Lochbrunner, Stefan,P?pcke, Ayla,Rentschler, Eva,Seitz, Michael
, p. 7947 - 7955 (2020)
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.
Synthesis and spectroscopic properties of isomeric trideuterio- and tetradeuterio pyridines
Pavlik, James W.,Laohhasurayotin, Somchoke
, p. 1485 - 1492 (2008/09/18)
(Chemical Equation Presented) The syntheses of the six possible isomeric trideuteriopyridines and the three possible isomeric tetradeuteriopyridines are described. These deuteriopyridines were characterized by their mass and NMR spectra.
