中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (5): 25-28.

• 研究论文 • 上一篇    下一篇

月桂胺盐酸盐结构相变机理的红外光谱研究

王玮, 李来明, 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:1991-08-27 修回日期:1991-11-15 出版日期:1992-10-10 发布日期:1992-10-10

STUDY ON MECHANISM OF STRUCTURAL TRANSITIONS OF LAURYLAMMONIUM CHLORIDE BY INFRARED SPECTROSCOPY

Wang Wei, Li Laiming, Xi Shiquan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1991-08-27 Revised:1991-11-15 Published:1992-10-10 Online:1992-10-10

PDF

415

被引次数

6 | 2

摘要： 月桂胺盐酸盐晶体的红外光谱研究表明,标题化合物两个结构相变的起始温度分别为327和339K。在327K以下晶体中分子以TT构象存在并以分子链相互平行的叉指状形式填充,339K以上分子以TG构象和部分GTG'构象存在并以非叉指状的六方形式填充,在327～339K之间则是一个分子构象由有序到无序、链填充由叉指状到非叉指状转变的中间过渡相。

关键词: 月桂胺盐酸盐, 固-固结构相变, 分子构象, 红外光谱

Abstract: Fourier transform infrared spectroscopy was used to study solid-solid phase transitions of laurylammonium chloride (LAC) in the temperature range from 290 to 365K. Two structural Phase transitions were observed at 327K and 339K, respectively. In the temperature below 327K, the packing of the hydrocarbon chains is considered to be intercalated with TT conformations. In the temperature between 327 and 339K, the TG defects occured and reached a maximum value at 339K. In this intermediate phase, the nonintercalated packing was found to be coexistent, with the intercalated packing in the intermediate phase. In the temperature above 339K, the packing of the chains is nonintercalated with GT and a few GTG'defects in hexagonal lattice.

Key words: laurylammonium chloride, structural phase transition, molecular conformation, infrared spectroscopy

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