^(51)V NMR监测[VS_4Cu_n](n≤6)簇合物自兜反应过程  

Probing Self-assembling Process of [VS_4-Cu_n] (n≤6) Clusters by ^(51)V NMR

作　　者：陈忠[1] 叶剑良[1] 蔡淑惠[2] 周兴旺[1] 万惠霖[1] 郑发鲲[3] 黄锦顺[3] 

机构地区：[1]厦门大学化学系,厦门361005 [2]厦门大学物理系固体表面物理化学国家重点实验室,厦门361005 [3]中国科学院福建物质结构研究所

出　　处：《物理化学学报》2000年第5期426-430,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金!(29832020和19605004)结构化学及固体表面物理化学国家重点实验室基金资助项目

摘　　要：采用　51VNMR监测在核磁管内模拟 (NH4 ) 3VS4 /Et4 NBr/CuBr/PPh3体系在CH2 Cl2 中的反应过程 ,研究了反应条件如反应物不同配比对生成各种 [VS4 Cun](n≤ 6)簇合物的影响 ,提供了该反应体系在CH2 Cl2 溶液中成簇过程的一些信息 .该方法不仅可用来研究反应机理 ,而且可用于指导一些条件难以确定 (溶剂、温度、酸碱度等 )的簇合物如低核数及更高核数V CuV NMR was used as a new pseudo in situ and nondestructive analytical tool to monitor and identify possible products of [VS 4Cu n] (n≤6) clusters. The reaction of (NH 4) 3VS 4/Et 4NBr/CuBr/PPh 3 systems with various molar ratios in CH 2Cl 2 were mimicked in NMR tubes. The reaction conditions for the formation of the [VS 4Cu n] clusters with different coordinate number of copper atoms n were studied. The results show the influence of the ratio among the reactants on the products and reveal the reaction mechanism in solution. This method not only provides some information about reaction mechanism, but also provides a guide in the synthesis of some clusters such as VCuS clusters with less or more coordinate copper number whose reaction conditions (solvent, temperature, pH etc.) are difficult to be determined.

关 键 词：^51VNMR 钒铜硫簇合物 自兜反应 反应过程 

分 类 号：O641[理学—物理化学]