期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 47, 期 9, 页码 2408-2421出版社
WILEY
DOI: 10.1002/pola.23331
关键词
2,5-bis(4 '-alkoxycarbonylphenyl)styrene; 2,5-bis(4 '-carboxyphenyl)styrene; chiral; columnar nematic phase; helical conformation; liquid-crystalline polymer; radical polymerization
资金
- National Natural Science Foundation of China [20674001, 20134010]
- National Distinguished Young Scholar Fund [20325415]
A facile synthetic route to prepare the dual-functional molecule, 2,5-bis(4'-carboxyphenyl)styrene, was developed. The esterification of this compound with chiral alcohols, that is, (S)-(+)-sec-butanol/(R)-(-)-sec-butanol, (S)-(+)-secoctanol/(R)-(-)-sec-octanol, and D-(+)-menthol/L-(-)-menthol, respectively, yielded three enantiomeric pairs of novel vinyl monomers, which underwent radical polymerization to obtain helical polymers with an excess screw sense. These polymers exhibited optical rotations as large as fourfold those of the corresponding monomers. Their helical conformations were quite stable as revealed by the almost unchanged chiroptical properties measured at different temperatures. The polymers with linear alkyl tails in the side-groups formed irreversibly columnar nematic phases in melt although the corresponding monomers were not liquid crystalline. Whereas, the polymers with cyclic tails generated no mesophase. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2408-2421, 2009
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据