六棱柱型金属团簇化合物W_2Ag_4S_8(dppy)_4的纳秒光限幅特性  

Nanosecond Optical Limiting Property of Hexagonal Prism Shaped Metal Cluster Compound W_2Ag_4S_8(dppy)_4

作　　者：常青[1,2] 郑和根[3] 宋瑛林[4] 赵利[1] 

机构地区：[1]复旦大学物理系,上海200433 [2]黑龙江大学电子工程学院,哈尔滨150080 [3]南京大学配位化学国家重点实验室,南京210009 [4]苏州大学物理系,苏州215006

出　　处：《无机化学学报》2009年第7期1141-1148,共8页Chinese Journal of Inorganic Chemistry

基　　金：中国博士后基金(No.20070410684);黑龙江省电子工程省级重点实验室(No.2006-05)项目资助

摘　　要：新合成了一种金属团簇化合物W2Ag4S8(dppy)4,(分子式为C68H56Ag4N4P4S8W2)并用X-射线单晶衍射结构分析方法测定了其晶体结构。单晶X-射线衍射数据表明这种金属团簇化合物具有六棱柱型。在纳秒激光脉冲作用下研究了W2Ag4S8(dppy)4的二甲基甲酰胺(DMF)溶液的光限幅特性。实验结果表明W2Ag4S8(dppy)4的DMF溶液在放置一段时间后光限幅特性明显优于新配制的DMF溶液,其光限幅特性明显强于C60甲苯溶液,表现出其具有较强的光限幅特性。为了研究W2Ag4S8(dppy)4的光限幅机制及光限幅特性在放置一段时间后发生变化的原因,又做了非线性散射和泵浦探测实验,并对其光限幅机制和光限幅特性在放置一段时间后发生变化的原因进行了分析。A kind of novel metal cluster compound W2Ag4S8 （dppy）4 was synthesized. Its molecular formula is C68H56Ag4N4P4S8W2. Compound was characterized by X-ray single-crystal diffraction. Crystal data show that W2Ag4S8 （dppy）4 is a hexagonal prism shaped metal cluster compound. The optical limiting（OL） characteristic for W2Ag4S8 （dppy）4 in N,N-dimethylformamide（DMF） was investigated by using nanosecond laser pulses with Z-scan technique. Experimental results show that OL characteristic of W2Ag4S8（dppy）4 in DMF which was placed after a period time is better than that of newly made, and obviously stronger than that of C60 in toluene, showing rather strong OL characteristic. Nonlinear scattering and pump-probe experiments for W2Ag4S8（dppy）4 were carried on to investigate its OL mechanism and the reasons of enhanced OL characteristic which was placed after a period of time. The OL mechanism and the reasons of enhanced OL characteristic were analyzed.

关 键 词：光限幅 非线性散射 泵浦-探测 

分 类 号：O614.22[理学—无机化学] O614.613[理学—化学]