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  

Infrared Spectroscopic Study of Mechanism of Phase Transition in Dodecylammonium Tetrachlorozincate

作　　者：郭宁[1] 王纬[1] 

机构地区：[1]辽宁大学化学系,青岛海洋大学海洋化学研究所

出　　处：《应用化学》1994年第4期25-30,共6页Chinese Journal of Applied Chemistry

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－ＮＨ＿３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。The mechanism of the solid-solid phase transition in the perovskite-type layer ofthe title complex has been studied by infrared spectroscopy.The phase transition is relatedto the structural change of alkyl chains and it is mainly arises from the change of the packingstructure and conformational order·disorder change in the alkyl chains.The phase transitionis accompanied by an obvious decrease of the hydrogen bond strength.The umelting”of thechains occurs owing to the TG defects near the terminal groups and GTG+GTG',as well asGG 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”.

关 键 词：四氯合锌酸 烷基铵 相变 红外光谱 

分 类 号：O743.5[理学—晶体学]