中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (4): 25-30.

• 研究论文 • 上一篇    下一篇

四氯合锌酸二(正十二烷基铵)晶体相变机理的付里叶变换红外光谱研究

郭宁1, 王纬2   

  1. 1. 辽宁大学化学系 沈阳 110036;
    2. 青岛海洋大学海洋化学研究所 青岛
  • 收稿日期:1993-11-25 修回日期:1994-04-25 出版日期:1994-08-10 发布日期:1994-08-10

Infrared Spectroscopic Study of Mechanism of Phase Transition in Dodecylammonium Tetrachlorozincate

Guo Ning1, Wang Wei2   

  1. 1. Department of Chemistry, Liaoning University, Shenyang 110036;
    2. Institute of Marine Chemistry, Qingdao Ocean University, Qingdao
  • Received:1993-11-25 Revised:1994-04-25 Published:1994-08-10 Online:1994-08-10

PDF

480

被引次数

3

摘要： 采用变温红外光谱研究了层结构标题配合物的固。固相变机理;相变主要与烷烃链和-NH3极性端基结构变化有关,主要来源于烷烃链的堆积结构和构象的有序。无序变化,同时伴有N-H…Cl氢键强度的降低,由于在高温烃链产生GTG+GTG'和临近端基的TG构象以及GG链段,链大量扭曲,形成了烷烃链的"熔化"态,发现同相和异相C-C伸缩振动频率对烷烃"链熔化"相变很敏感,可用于表征烷烃链的链长变化。

关键词: 四氯合锌酸烷基铵, 相变, 分子构象, 红外光谱

Abstract: The mechanism of the solid-solid phase transition in the perovskite-type layer of the title complex has been studied by infrared spectroscopy.The phase transition is related to the structural change of alkyl chains and it is mainly arises from the change of the packing structure and conformational order-disorder change in the alkyl chains.The phase transition is accompanied by an obvious decrease of the hydrogen bond strength.The "melting"of the chains occurs owing to the TG defects near the terminal groups and GTG+GTG',as well as GG defects at higher temperature,It is found that the frequencies of an in-phase and an out-of-phase streching of C-C bonds are sensitive to the phase transition of the"chain melting".

Key words: dodecylammonium tetrachlorozincate, phase transition, molecular conformation, infrared spectroscopy

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