基于芘和多分支聚环氧乙烷链的V型刚柔分子的合成与自组装
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- 英文论文题名：Synthesis, and Self-Assembly of V-shaped Rod–Coil Molecules Based on Pyrene and Multi-branched PEO Chain
- 论文作者：郭宝峰 ; 陈召年 ; 赵杰 ; 钟克利
- 英文论文作者：Baofeng Guo ; Zhaonian Chen ; Jie Zhao ; Keli Zhong ; College of Chemistry and Chemical Engineering ; Bohai University.Food Safety Key Lab of Liaoning Province
- 年：2016
- 作者机构：渤海大学化学化工学院辽宁省食品安全重点实验室;
- 论文关键词：芘 ; 多分支 ; V型 ; 刚柔分子 ; 自组装
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十四分会：超分子组装与软物质材料
- 语种：中文
- 分类号：O631.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十四分会 ; 超分子组装与软物质材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：357k
- 原文格式：D
- 会议级别：全国
摘要
设计合成了二分支和三分支的聚环氧乙烷(PEO)为柔性嵌段,芘的1,8-位通过乙炔基连两个联苯,在联苯末端通过酯基连接苯酚为刚性嵌段的V型刚柔分子。利用飞行质谱(Maldi-TOF-Mass),核磁共振(~1H-NMR)对V型刚柔分子的结构进行了表征,通过差示扫描量热仪(DSC)和X-ray衍射实验对其在本体中的自组装行为进行了研究。结果表明:在本体自组装中,6种分子都无液晶相,但在固态时自组装结构有所不同。三分支刚柔分子可自组装成六方柱状结构和单分子层状结构,而二分支刚柔分子可自组装成双连续立方体结构和单分子层状结构。这说明随着分支数的增加或柔性链的延长,柔性链之间的排斥力增大,导致分子间的微相分离作用变大,破坏了刚棒间的p-p堆积作用,因此不宜形成更加有序的相结构。
V-shaped rod-coil molecules contained di- and tri-branched PEO as a flexible block, using pyrene and biphenyl linking by acetenyl as a rigid block, were successfully synthesized and characterized. The self-assembly behavior of V-shaped molecules in bulk were studied by DSC and X-ray. The results show that the V-shaped molecules have no liquid crystalline phase and their self-assembled structures are different in the solid state. The tribranched V-shaped rod-coil molecules can self-assemble into the hexagonal columnar and lamellar structure, and dibranched V-shaped molecules can form the bicontinuous cubic and lamellar structure. This results means that repulsive force between the flexible chain is enlarged and the π-π stacking interaction between the rigid rod is damaged with increasing the length or number of flexible chain, and which leads to the orderly phase structure be unfavorable to form.
V-shaped rod-coil molecules contained di- and tri-branched PEO as a flexible block, using pyrene and biphenyl linking by acetenyl as a rigid block, were successfully synthesized and characterized. The self-assembly behavior of V-shaped molecules in bulk were studied by DSC and X-ray. The results show that the V-shaped molecules have no liquid crystalline phase and their self-assembled structures are different in the solid state. The tribranched V-shaped rod-coil molecules can self-assemble into the hexagonal columnar and lamellar structure, and dibranched V-shaped molecules can form the bicontinuous cubic and lamellar structure. This results means that repulsive force between the flexible chain is enlarged and the π-π stacking interaction between the rigid rod is damaged with increasing the length or number of flexible chain, and which leads to the orderly phase structure be unfavorable to form.
引文
[1]Shin S.,Lim S.,Kim Y.,et al.J.Am.Chem.Soc.,2013,135(6):2156-2159.
[2]Huang,Z.;Kang,S.K.;Banno,M.et al.Science,2012,337(6101):1521-1526.
[2]Huang,Z.;Kang,S.K.;Banno,M.et al.Science,2012,337(6101):1521-1526.