应用化学 ›› 1991, Vol. 0 ›› Issue (4): 71-73.

• 研究简报 • 上一篇    下一篇

[n-C12H25NH3]2ZnCl4配合物相变拉曼光谱研究

郭宁, 曾广赋, 王翠英, 席时权   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1990-07-25 修回日期:1990-11-27 出版日期:1991-08-10 发布日期:1991-08-10

RAMAN SPECTROSCOPY STUDY OF PHASE TRANSITION OF (n-C12H25NH3)2 ZnCl4

Guo Ning, Zeng Guangfu, Wang Cuiying, Xi Shiquan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1990-07-25 Revised:1990-11-27 Published:1991-08-10 Online:1991-08-10

摘要: 通式为[CnH2n+1NH3]2MX4(M=Cu,Mn,Zn…、X=Cl,Br)(简写CnM)四卤合金属酸二烷基铵系列化合物一般具有二维层结构[1]。它是由薄的无机层阴离子MX42-和厚的烷基铵阳离子[R-NH3]+组成的碳氢层规则交替构成的“夹心面包”型体系。

关键词: 拉曼光谱, 分子构象, 相变, 四氯合金属酸烷基铵

Abstract: The perovskite type of compound (n-C12H25NH3)2ZnCl4(C12Zn) exhibits a solid-solidphasetransition (ΔH = 63.88kJ·mol-1) at 365.86K.A temperature dependence study of Ramanspectra of C12Zn provides evidence of the occurence of the structural phase transition relatedto the dynamics of the alkylammonium ions.The phase below 365.86K is ordered and cont-ains the all-trans alkyl chains.Above 365.86K, the alkyl chains become conformationaldisordered and leads to a achain melting".

Key words: Raman spectroscopy, molecular conformation, phase transition, bis(n-alkylammonium)tetrachlorozincate