物理化学学报 >> 2012, Vol. 28 >> Issue (06): 1418-1424.doi: 10.3866/PKU.WHXB201203291

软物质 上一篇    下一篇

芳香席夫碱衍生物在有序分子膜中的相行为与二维-三维形变

焦体峰1,2, 刘鸣华2   

  1. 1. 燕山大学环境与化学工程学院, 河北省应用化学重点实验室, 河北秦皇岛 066004;
    2. 中国科学院化学研究所, 胶体、界面与化学热力学院重点实验室, 北京 100190
  • 收稿日期:2012-03-09 修回日期:2012-03-28 发布日期:2012-05-17
  • 通讯作者: 焦体峰, 刘鸣华 E-mail:tfjiao@ysu.edu.cn; liumh@iccas.ac.cn
  • 基金资助:

    国家自然科学基金(20903078), 中国博士后科学基金(2011M500540), 河北省留学回国人员科技择优资助经费(2011052)和河北省高校百名优秀创新人才支持计划(CPRC020)资助

Phase Behaviors and 2D-3D Morphological Transition of Aromatic Schiff Base Derivatives in Organized Molecular Films

JIAO Ti-Feng1,2, LIU Ming-Hua2   

  1. 1. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei Province, P. R. China;
    2. CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2012-03-09 Revised:2012-03-28 Published:2012-05-17
  • Contact: JIAO Ti-Feng, LIU Ming-Hua E-mail:tfjiao@ysu.edu.cn; liumh@iccas.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20903078), China Postdoctoral Science Foundation (2011M500540), Scientific Research Foundation for Returned Overseas Chinese Scholars of Hebei Province, China (2011052), and Support Program for Hundred Excellent Innovation Talents from Universities and Colleges of Hebei Province, China (CPRC020).

摘要: 研究了芳香席夫碱的设计合成、界面相行为以及与铜离子的配位过程, 并与离位合成的铜复合物的界面组装行为进行了对比. 利用表面压-面积等温线、紫外光谱、红外光谱、原子力显微镜等一系列实验方法来详细表征组装膜. 结果表明, 席夫碱配体与铜复合物均可在气液界面上形成稳定的有序组装膜, 并可以转移到固体基片上构筑多层膜. 进而, 席夫碱配体在纯水界面上表现出奇特的相变. 在相变点前后, 二维的平膜变化成了三维的纤维状组装结构. 然而, 对于铜离子亚相上的组装过程却没有出现较大的变化. 两者之间明显的差异可归因于在气液界面超分子组装过程中的分子构型以及疏水性能的不同引起的. 目前的工作为制备和调控有序组装膜提供了有益探索.

关键词: 有序分子膜, 气液界面, 席夫碱, 相变, 组装

Abstract: A novel aromatic Schiff base ligand has been designed and its interfacial phase behavior as well as its in situ coordination with Cu(II) ions on the surface of pure water was compared with those of the corresponding pre-synthesized Cu(II) complex. Surface pressure-area isotherms, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, and atomic force microscopy were used to characterize deposited monolayer and multilayer films of the complexes. Both the ligand and corresponding complex formed stable monolayer or multilayer films at the air/water interface, which could be subsequently transferred onto solid substrates to construct Langmuir-Blodgett films. A novel phase transition was observed when the ligand was spread on the surface of pure water. During this phase transition, the two-dimensional (2D) flat film changed into three-dimensional (3D) fiber-like nanoarchitectures. However, upon coordination with Cu(II) ions, only flat films were obtained. This phenomenon was thought to be caused by the change of molecular conformation and/or hydrophobicity during supramolecular assembly at the air/water interface. This work provides a simple clue for regulating the nanostructures in organized films.

Key words: Organized molecular film, Air/liquid interface, Schiff base, Phase transition, Assembly

MSC2000: 

  • O647