572914-63-7Relevant academic research and scientific papers
Effects of cation-anion interactions on the structures and photophysical properties of anionic d0 tungsten-benzylidyne complexes
Simpson, Cheslan K.,Da Re, Ryan E.,Pollagi, Timothy P.,Steele, Ian M.,Dallinger, Richard F.,Hopkins, Michael D.
, p. 309 - 319 (2003)
The structures and photophysical properties of anionic tungsten-benzylidyne complexes of the type [Na(L)][W(≡CPh)(OBut)4] ([Na(L)]1; L=blank, 15-crown-5, crypt-2,2,2) are strongly dependent on the nature of the [Na(L)]+ ion. The structures of the 1- ions are qualitatively similar, consisting of square-pyramidal tungsten centers with short W≡C bonds, but differ as a function of cation in the extent of their Na-OBut interactions, the geometries of their OBut ligands, and their W-O bond distances. The 1- ions exhibit long-lived luminescence (τ>1 μs) in fluid solution and the solid state at room temperature. The emission lifetimes and energies are cation dependent even in polar solvents, indicating the presence of [Na(L)]+/1- ion pairs in solution for some L. The emissive state is a spin triplet of either [π(W≡CPh)]1[dxy]1 or [π(W≡CPh)]1[π*(W≡CPh)]1 configuration.
