Carrella, Manfred Wagner, Martin PanthГ¶fer, Angela MГ¶ller, Eva Rentschler, Katja Heinze. Johannes Moll, Christoph FГ¶rster, Alexandra KГ¶nig, Luca M.Cyclometalated Iron and Ruthenium Complexes Supported by a Tetradentate Ligand Scaffold with Mixed O, N, and C Donor Atoms: Synthesis, Structures, and Excited-State Properties. Kwok-Chung Law, Zhou Tang, Liangliang Wu, Qingyun Wan, Wai-Pong To, Xiaoyong Chang, Kam-Hung Low, Yungen Liu, Chi-Ming Che.Doublet Ground State in a Vanadium(II) Complex: Redox and Coordinative Noninnocence of Tripodal Ligand Architecture. This article is cited by 37 publications. Our comprehensive study demonstrates that vanadium(III) complexes with d 2 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.

In addition, mer- 3 shows very strong blue fluorescence with 2% quantum yield in acetonitrile at room temperature. Here, we report the vanadium(III) complex mer- 3 yielding phosphorescence around 1100 nm in valeronitrile glass at 77 K as well as at room temperature in acetonitrile with 1.8 Г— 10 вЂ“4% quantum yield (ddpd = N, NвЂІ-dimethyl- N, NвЂІ-dipyridine-2-ylpyridine-2,6-diamine). No Earth-abundant first-row transition metal complexes have displayed emission >1000 nm at room temperature in solution up to now. Luminescence in the near-infrared spectral region is even more difficult to achieve as further nonradiative pathways come into play. Only a handful of 3d n metal complexes ( n в‰ 10) show sizable luminescence at room temperature. 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.

Gerald j. ford ultima iii