2009年6月
Optically active helical structure and magnetic interaction of poly(phenylacetylene)-based polyradicals
POLYHEDRON
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 28
- 号
- 9-10
- 開始ページ
- 1927
- 終了ページ
- 1929
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.poly.2008.10.067
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
We synthesized optically active polyradicals possessing an excess of one-handed helical backbone by helix-sense-selective polymerization (HSSP) of achiral monomers which was promoted by rhodium complex catalyst in the presence of (R)- or (S)-1-phenylethylamine. The monomer, which had two hydroxy groups and a hydrogalvinoxyl unit, gave the corresponding polymer with an optically active helical conformation stabilized by intramolecular hydrogen bonding. The chemical oxidation of the polymer yielded the corresponding optically active helical polyradical with high spin concentration. The static magnetic susceptibility of the chiral polyradical was measured using a SQUID magnetometer. We have found that the stronger antiferromagnetic interaction was observed for the polyradical synthesized by HSSP in comparison with the polyradical via polymerization in the presence of racemic phenylethylamine. (C) 2008 Elsevier Ltd. All rights reserved
- リンク情報
- ID情報
-
- DOI : 10.1016/j.poly.2008.10.067
- ISSN : 0277-5387
- Web of Science ID : WOS:000267580000066