首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Convenient synthesis of fully and partially deuterated stereoregular poly(phenylacetylene)s bearing a carboxy pendant and helicity induction on the polymers with chiral amines and its memory
Authors:Kazuhide Morino  Takeshi Asari  Katsuhiro Maeda  Eiji Yashima
Institution:Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
Abstract:Poly(4-carboxyphenyl)acetylene] and its derivatives deuterated in the main chain and/or on the phenyl group (poly- 1 's) were conveniently synthesized by the polymerization of 4-ethynylbenzoic acid or its derivative deuterated on the phenyl group in the presence of bases with a water-soluble rhodium complex in water or deuterium oxide. The obtained polymers possesses highly cis–transoidal stereoregular structures according to NMR and Raman spectroscopy. Possible deuterium isotope effects of these partially and fully deuterated poly- 1 's during the helicity induction with chiral amines and its memory assisted by achiral amines were investigated. The thermal cis–trans isomerization of the methyl esters of poly- 1 's was also studied with 1H NMR spectroscopy. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4711–4722, 2004
Keywords:chiral  circular dichroism  degradation  helix  isomerization  isotope effect  polyacetylenes
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号