Synthesis,Structure and Optical Limiting （OL） Properties of a Novel Incomplete Cubane-like Cluster [PPh₄][（η⁵-C₅Me₅） WS₃-（CuBr）（CuI）₂（μ-dppm）]

【Abstract】 Reaction of [PPh₄][（η 5-C₅Me₅）WS₃] with CuI,CuBr and bis^{diphenylphosphino}methane （dppm） （molar ratio=1∶2∶1∶1） in MeCN gave rise to [PPh₄][（η 5-C₅Me₅）WS₃（CuBr）（CuI）₂-（μ-dppm）] （1） in high yield. Compound 1 crystallizes in the monoclinic,space group P2₁/n with lattice parameters:a=1.2906（4） nm, b=1.5006（8） nm,c=3.1484（6） nm,β= 92.12（2）°,V=6.093（3） nm 3,Z=4. The structure of the anion of 1 contains an incomplete WS₃Cu₃ cubane-like core in which two CuI units are bridged by a dppm ligand. The W—Cu distances vary in the range of 0.2644（1）—0.2793（1） nm. The optical limiting （OL） properties of 1 in MeCN were measured with the laser pulse-width of 12-ns at 532 nm,and the nanosecond OL effect may be due to the reverse saturable absorption （RSA） related to the excited triplet states.更多还原