Synthesis,Structure and Optical Limiting (OL) Properties of a Novel Incomplete Cubane-like Cluster [PPh_4][(η~5-C_5Me_5) WS_3-(CuBr)(CuI)_2(μ-dppm)]  

作　　者：虞虹 徐庆锋 纪顺俊 郎建平 孙真荣 

机构地区：[1]School of Chemistry and Chemical Engineering,Suzhou University [2]Key Laboratory of Optical and Magnetic Resonance Spectroscopy,and Department of Physics,East China Normal University

出　　处：《Chinese Journal of Chemistry》2003年第12期1591-1595,共5页中国化学（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 0 2 710 3 6) ,theNaturalScienceFoundationoftheEducationCommitteeofJiangsuProvince (No .0 2KJB15 0 0 0 1) ,StateKeyLabofCoordinationChemistryofNanjingUniversity ,andtheScientificResearchF

摘　　要：Reaction of [PPh_4][(η 5-C_5Me_5)WS_3] with CuI,CuBr and bis^(diphenylphosphino)methane (dppm) (molar ratio=1∶2∶1∶1) in MeCN gave rise to [PPh_4][(η 5-C_5Me_5)WS_3(CuBr)(CuI)_2-(μ-dppm)] (1) in high yield. Compound 1 crystallizes in the monoclinic,space group P2_1/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 WS_3Cu_3 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.Reaction of [PPh_4][(η 5-C_5Me_5)WS_3] with CuI,CuBr and bis^(diphenylphosphino)methane (dppm) (molar ratio=1∶2∶1∶1) in MeCN gave rise to [PPh_4][(η 5-C_5Me_5)WS_3(CuBr)(CuI)_2-(μ-dppm)] (1) in high yield. Compound 1 crystallizes in the monoclinic,space group P2_1/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 WS_3Cu_3 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.

关 键 词：tungsten cluster copper cluster sulfur cluster crystal structure optical limiting property 

分 类 号：O614[理学—无机化学]