物理化学学报 >> 2001, Vol. 17 >> Issue (08): 765-768.doi: 10.3866/PKU.WHXB20010821

研究简报 上一篇    

双头基两亲分子在气液界面的Langmuir铺展膜结构

吕庆;李林;刘鸣华   

  1. 中国科学院化学研究所 分子科学中心 1胶体与界面科学开放实验室,2高分子物理国家重点实验室,北京 100080
  • 收稿日期:2001-02-07 修回日期:2001-04-06 发布日期:2001-08-15
  • 通讯作者: 刘鸣华

Structures of Langmuir Films of Bolaamphiphiles at the Air/Water Interface

Lv Qing;Li Lin;Liu Ming-Hua   

  1. Laboratory of Colloid and Interface Science,2State Key Laboratory of High Polymer Physics and Chemistry,Center of Molecular Science,Institute of Chemistry,Chinese Academy of Sciences, Beijing 100080
  • Received:2001-02-07 Revised:2001-04-06 Published:2001-08-15
  • Contact: Liu Ming-Hua

摘要: 用表面压-面积等温线,原子力显微镜(AFM)和X射线衍射(XRD)对两种具有不同取代位置的新型双头基两亲分子(bolaamphiphile)A和B在气液界面形成的Langmuir铺展膜的结构进行了研究,化合物1,20-二十碳二β-萘酯(B)在气液界面形成了拉伸型 Langmuir单分子膜,而化合物1,20-二十碳二α-萘酯(A)在气液界面则形成了具有三层分子厚度的二维结晶膜.

关键词: 双头基两亲分子, 气液界面, 拉伸型单分子膜

Abstract: Bolaamphiphile, in which two head groups are linked by one or two hydrophobic chains,has been attracting much interest in recent years. The structures of the Langmuir films spread from two novel bolaamphiphiles containing α-naphthyl and β-naphthyl groups at the air/water interface have been investigated. Surface pressure -area isotherms,AFM and XRD measurements reveal that when spreading at the air/water surface,the molecule containing α-naphthyl forms a triple-layer Langmuir film,while the one containing β-naphthyl forms a stretched monolayer.

Key words: Bolaamphiphile, Air/water interface, Stretched monolayer