Minell, Martin; Maley, Walter J., Inorganic Chemistry, 1989, vol. 28, # 15, p. 2954 - 2958
作者:Minell, Martin、Maley, Walter J.
DOI:——
日期:——
A synthetic route to M(CO)6−n(RNC)n (M = Cr, Mo, W; n = 1−6) from M(CO)6 and isonitriles
作者:Neil J. Coville、Michel O. Albers
DOI:10.1016/s0020-1693(00)93476-5
日期:1982.1
Generation of Powerful Tungsten Reductants by Visible Light Excitation
作者:Wesley Sattler、Maraia E. Ener、James D. Blakemore、Aaron A. Rachford、Paul J. LaBeaume、James W. Thackeray、James F. Cameron、Jay R. Winkler、Harry B. Gray
DOI:10.1021/ja4047119
日期:2013.7.24
The homoleptic arylisocyanide tungsten complexes, W(CNXy)(6) and W(CNIph)(6) (Xy = 2,6-dimethylphenyl, Iph = 2,6-diisopropylphenyl), display intense metal to ligand charge transfer (MLCT) absorptions in the visible region (400-550 nm). MLCT emission (lambda(max) approximate to 580 nm) in tetrahydrofuran (THF) solution at rt is observed for W(CNXy)(6) and W(CNIph)(6) with lifetimes of 17 and 73 ns, respectively. Diffusion-controlled energy transfer from electronically excited W(CNIph)(6) (*W) to the lowest energy triplet excited state of anthracene (anth) is the dominant quenching pathway in THF solution. Introduction of tetrabutylammonium hexafluorophosphate, [(Bu4N)-N-n][PF6], to the THF solution promotes formation of electron transfer (ET) quenching products, [W(CNIph)(6)](+) and [anth](center dot-). ET from *W to benzophenone and cobalticenium also is observed in [(Bu4N)-N-n][PF6]/THF solutions. The estimated reduction potential for the [W(CNIph)(6)](+)/*W couple is -2.8 V vs Cp2Fe+/0, establishing W(CNIph)(6) as one of the most powerful photoreductants that has been generated with visible light.