Helicity induction on a poly (phenylacetylene) bearing carboxy groups at the meta-position

被引：5

作者：

Goto, Hidetoshi ^{[1
]}

Morino, Kazuhide ^{[1
]}

Morishita, Toru ^{[1
]}

Maeda, Katsuhiro ^{[1
]}

Yashima, Eiji ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mol Design & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

KOBUNSHI RONBUNSHU | 2006年 / 63卷 / 05期

关键词：

helicity induction; optically active; chiral; poly(phenylacetylene); circular dichroism;

D O I：

10.1295/koron.63.325

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Helicity induction on a poly (phenylacetylene) bearing a carboxy group at the meta-positions (poly-1m) with chiral amines and amino alcohols was investigated in dimethyl sulfoxide (DMSO) and water using circular dichroism (CD) spectroscopy. Poly-1m was synthesized by the polymerization of triphenylmethyl 3-ethynylbenzoate with a rhodium complex, followed by hydrolysis of the ester groups. The H-1 NMR spectrum of poly-1m indicated that the polymer had a highly cis-transoidal structure. Poly-1m exhibited an induced circular dichroism (ICD) in the polymer backbone region upon complexation with optically active amines and amino alcohols in DMSO and water, due to a predominantly one-handed helix formation. The pattern and magnitude of the Cotton effects of poly-1m were significantly different from those of a poly (phenylacetylene) bearing a carboxy group at the para-positions (poly-1p), indicating that the substituent position of functional groups on the phenyl group is important for the effective helicity induction on the poly (phenylacetylene)s.

引用

页码：325 / 330

页数：6

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