摘要两亲性分子是指一类含有疏水部分和亲水部分的分子。它们能在水溶液或者是固/液界面上自组装形成大小和尺寸确定的分子组装体，例如囊泡和胶束。现已有研究表明，很多方法都可以有效的增强其自组装结构的稳定性。如向bola型两亲性分子中引入介晶基团（特别是引入强π-π叠加作用的基团）或者是通过聚合的方法。然而影响自组装结构稳定性的因素除了刚性介晶基团，还有亲水头基的不同、烷基链长度、氢键等等。基于这些研究思路，本文主要设计合成一系列bola型两亲性分子，其特征是氢键数目以及介晶基团长度不同。再通过电镜等各种表征手段研究其自组装行为的规律,得出氢键对bola型两亲性分子自组装行为的影响。经过初步电导率法测定临界胶束浓度值（CMC)发现，随着氢键数目的增加以及介晶基团长度的增加，都会使得相应的两亲性分子自组装所需要的CMC值低。44034

毕业论文关键词：bola型两亲性分子;自组装;氢键

Abstract

Amphiphiles refers to a molecule which contains both hydrophobic and hydrophilic parts. They can self-assemble in solution or at the solid/liquid interface to form molecular assemblies with defined size and shape, such as vesicles and micelles. Now efforts have been shown that some methods can effectively increase the stability of self-assembled structures. For example, introducing mesogenic (especially the groups contain strong π—π interaction) or polymerizable groups into bolaamphiphiles. However, the different hydrophobic alkyl chain lengths, hydrophilic head groups, hydrogen bonds and so on, which can also be the factors affecting the stability of self-assembled structures. Based on these studies, we designed and synthesized a series of bolaamphiphiles, which characterized by different number of hydrogen bonds as well as the length of the mesogenic groups. Then, we studied the principle of their self-assembly behavior by electron microscopy and other methods . It is concluded that when the number of hydrogen bonding is increased，the CMC of bola amphiphiles is lowed.

 Key words: bolaamphiphiles; self-assemble; hydrogen bonds

 目录

摘要 2

Abstract 3

目录 4

第一章 绪论 5

1.1 研究背景 5

1.2 两亲性分子概述 5

1.3临界胶束浓度 6

1.3.1临界胶束浓度的形成 6

1.3.2临界胶束浓度的测定方法 7

1.3.2.1表面张力 7

1.3.2.2电导率 7

1.4 bola型两亲性分子 7

1.4.1 bola型两亲性分子的发展 7

1.4.2 bola型两亲性分子的自组装 8

1.4.3 自组装结构稳定化的方法 8

1.4.3.1 引入刚性介晶基团 8

1.4.3.2 强π-π叠加作用 9

1.4.3.3 氢键 9

1.5 本论文的研究目的和思路 9

第二章 氢键对bola型两亲性分子自组装行为的影响研究 10

2.1实验部分 10

2.1.1实验药品 10

2.1.2实验仪器 氢键对bola型两亲性分子自组装行为的影响研究:http://www.751com.cn/huaxue/lunwen_45187.html