物理化学学报 >> 2005, Vol. 21 >> Issue (05): 550-555.doi: 10.3866/PKU.WHXB20050518

研究论文 上一篇    下一篇

一新种型含肉桂酸的Bola型两亲分子在LB膜中的分子排列和分子识别

阎云; 郭素; 熊玮; 黄建滨; 李子臣; 马季铭   

  1. 分子动态与稳态结构国家重点实验室，北京大学化学与分子工程学院，北京    100871
  • 收稿日期:2004-12-27 修回日期:2005-02-24 发布日期:2005-05-15
  • 通讯作者: 黄建滨 E-mail:jbhuang@pku.edu.cn

Molecular Arrangement and Recognition of a New Bolaform Cinnamic Acid Derivative in LB Films

YAN Yun; GUO Su; XIONG Wei; HUANG Jian-Βin; LI Zi-Chen; MA Ji-Ming   

  1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing   100871
  • Received:2004-12-27 Revised:2005-02-24 Published:2005-05-15
  • Contact: HUANG Jian-Βin E-mail:jbhuang@pku.edu.cn

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摘要： 制备了一种含肉桂酸基团的Bola型两亲分子HDC(4-(10-羟基癸氧基)-10-羟基癸氧基肉桂酸酯). 该分子在空气/水界面形成多分子层Langmuir膜结构. 紫外光照可使膜中HDC分子发生光致二聚，也可使HDC与1,16-十六碳二醇形成的混和膜中HDC分子发生二聚. 光照前后膜中分子倾角分别为58.8°和53.2°. 从实验结果推测了分子排列模型，认为HDC分子在LB膜中有序排列，这来源于分子间π-π相互作用和疏水亚甲基链的Z型构象堆积.

关键词: Bola型肉桂酸衍生物, LB膜, 光致二聚, 分子排列, 分子识别

Abstract: A bolaamphiphile containing cinnamic acid moiety, [4-(10-hydroxydecanyloxy)-10-hydroxydecanylcinnamate, abbreviated HDC], was synthesized and the LB films of HDC were studied. It was found from the results of π－A isotherms that multilayers of HDC were formed at the air/water interface. The photoreaction of HDC in LB films induced by UV light was investigated with UV and IR measurements. Photodimerization also took place in the mixed LB films of HDC and 1,16-hexadecanediol. The spectra results showed that the HDC molecules assembled orderly due to the separated recognition of π-π interaction and the zigzag stacking of methylene groups. XRD studies indicated that bilayers formed in the LB films with a tilt angle of 58.8° and 53.2° before and after UV irradiation, respectively. A packing model of HDC was also proposed.

Key words: Bolaform cinnamic acid derivative, Langmuir-Blodgett films, Photodimerization, Molecular arrangement, Molecular recognition