Synthesis, Structure and Nonlinear Optical Properties of a Novel Cluster Compound Containing 1,1′-Bis(diphenylphosphino)ferrocene(dppf)

A novel cluster WCu2S4(dppf)2·4DMF was synthesized by the reaction of (NH4)2WS4 with CuCl and 1,1′-bis(diphenylphosphino)ferrocene (dppf) in the solid state, and its crystal structure has been characterized by X-ray diffraction. The cluster has a novel new skeletal structure with five metal atoms nearly in a line. Investigation of third-order optical nonlinear z-scan shows that it exhibits good nonlinear optical properties in a 1.2×10-4 mol·dm-3 DMF solution.