Novel Luminescent Tetranuclear and Pentanuclear Copper(I)−Dithiolates
datasetposted on 27.06.2003, 00:00 by Huan Xu, John H. K. Yip
Tetranuclear [Cu4(μ2-dppm)3(μ2-μ2-NS2)(μ2-μ4-NS2)] (1) and pentanuclear [Cu5(μ2-dppm)4(μ3-μ-3-NS2)2]PF6 (2·PF6) (dppm = bis(diphenylphoshino)methane, NS22- = 1,8-naphthalenedithiolate) were synthesized from the reactions between NS22- and [Cu2(μ2-dppm)2(CH3CN)2](PF6)2. Compound 1 features a square Cu4 core capped by a 5-coordinate S atom while 2·PF6 exhibits an unprecedented square planar Cu5 core. Both complexes display dual emissions at 480 and 620 nm which arise from ligand-centered nπ* and ligand−metal charge-transfer excited states, respectively.