Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (05): 426-430.doi: 10.3866/PKU.WHXB20000510

• ARTICLE • Previous Articles     Next Articles

Probing Self-assembling Process of [VS4-Cun](n6) Clusters by 51V NMR

Chen Zhong, Ye Jian-Liang, Cai Shu-Hui, Zhou Xing-Wang, Wan Hui-Lin, Zheng Fa-Kun, Huang Jin-Shun   

  1. Department of Chemistry,Department of Physics,State Key Laboratory for Physical Chemistry of Solid Surface,Xiamen University,Xiamen 361005|Fujian Institute of Research on the Structure of Matter,the Chinese Academy of Sciences,State Key Laboratory of Structure Chemistry,Fuzhou 350002
  • Received:1999-08-09 Revised:1999-11-03 Published:2000-05-15
  • Contact: Chen Zhong E-mail:chenz@jingxian.xmu.edu.cn

Abstract:

51V NMR was used as a new pseudo in situ and nondestructive analytical tool to monitor and identify possible products of [VS4-Cun] (n≤6) clusters. The reaction of (NH 4) 3VS 4/Et 4NBr/CuBr/PPh 3 systems with various molar ratios in CH2Cl2 were mimicked in NMR tubes. The reaction conditions for the formation of the [VS 4-Cu 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 V-Cu-S clusters with less or more coordinate copper number whose reaction conditions (solvent, temperature, pH etc.) are difficult to be determined.

Key words: 51V NMR, V-Cu-S clusters, Self-assemble, Reaction process