高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (1): 174.

• 论文 • 上一篇    下一篇

倒浮萍聚合物ES-3LB膜掠角反射-吸收红外光谱的研究

王强, 徐蔚青, 赵冰   

  1. 吉林大学超分子结构与材料教育部重点实验室, 长春 130023
  • 收稿日期:2002-02-01 出版日期:2003-01-24 发布日期:2003-01-24
  • 通讯作者: 赵 冰(1964年出生),男,教授,博士生导师,主要从事分子组装体的谱学等研究.E-mail:wqxu@mail.jlu.edu.cn E-mail:wqxu@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29975011,29633010)资助

A Multilayer Langmuir-Blodgett Film of Reversed Duckweed Polymer ES-3 Studied by Infrared Grazing Reflection-absorption Spectroscopy

WANG Qiang, XU Wei-Qing, ZHAO Bing    

  1. Key Laboratory for Supramolecular Structure and Material of Ministry of Education, Jilin University, Changchun 130023, China
  • Received:2002-02-01 Online:2003-01-24 Published:2003-01-24

摘要: 用傅里叶变换红外掠角反射-吸收光谱技术对ES-3LB膜的取向和相变行为进行了详细的研究.结果表明,在金表面上制备的ES-3LB膜中烷基链基本垂直于基面.相转变行为的研究表明,ES-3LB膜有3个相变点,分别在65,105和140℃.第一个相变过程表现为LB膜从一种有序状态到另一种有序状态的转变;第二个相变过程表现为LB膜中烷基链的有序-无序转变;第三个相变过程是LB膜的层状结构坍塌转变为各向同性熔融体的过程.

关键词: 倒浮萍聚合物, LB膜, 相变, 掠角反射-吸收红外光谱

Abstract: Molecular orientation and phase transition behavior in the multilayer Langmuir-Blodgett(LB) film of reversed duckweed polymer ES-3 were investigated by infrared grazing reflection-absorption(IR-GRA) spectroscopy. It was found that the orientation of alkyl chains was nearly perpendicular to the substrate surface for ES-3 LB film on Au-evaperated glass slide. The study on its thermal transition behavior indicates that ES-3 LB film has three phase transition processes,occurring near 65, 105 and 140 ℃, respectively. The first transition corresponds to a conversion from a highly ordered state to the slightly less ordered one with a little increase in the mobility of alkyl chains; the second process is attributable to the order-disorder transition of alkyl chains; and the third is a process of collapse of layer structure.

Key words: Reversed duckweed, LB film, Phase transition, Grazing reflection-absorption infrared spectroscopy

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