Structures and properties of supramolecular liquid-crystalline side-chain polymers built through intermolecular hydrogen bonds

被引:126
作者
Kato, T
Kihara, H
Ujiie, S
Uryu, T
Frechet, JMJ
机构
[1] UNIV TOKYO,INST IND SCI,MINATO KU,TOKYO 106,JAPAN
[2] SHIMANE UNIV,DEPT MAT SCI,MATSUE,SHIMANE 690,JAPAN
[3] CORNELL UNIV,DEPT CHEM,BAKER LAB,ITHACA,NY 14853
关键词
D O I
10.1021/ma9609341
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The design, structure, and properties of supramolecular liquid-crystalline side-chain polymers are described. In particular, we show how several simple H-bonding building blocks can be used for the formation of various liquid-crystalline structures. Poly[4-(6-(acryloloxy)hexyl- and -unde-cyloxy)benzoic acid] (PmOBA; m = 6, 11) have been employed as polymer components. A variety of supramolecular mesogenic ''copolymers'' based on one polymeric component have been designed and prepared by simple self-assembly. Cooperation of the hydrogen bond and electron donor-acceptor interactions results in the mesophase stabilization for the ''copolymeric'' supramolecular structures of PmOBA with a mixture of trans-4-methoxy-4'-stilbazole (10Sz) and trans-4-cyano-4'-stilbazole (SzCN) or trans-4-nitro-4'-stilbazole (SzNO(2)). When a bifunctional molecule, 4,4'-bipyridine (BPy), is used as a component for ''copolymeric'' structures, supramolecular copolymeric networks based on PmOBA have been formed by self-assembly. The networks exhibit stable mesomorphic behavior and reversible phase transitions due to the dynamics of the hydrogen bonds.
引用
收藏
页码:8734 / 8739
页数:6
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