Conformational transition between random coil and helix of copolymers of N-propargylamides

被引：22

作者：

Deng, JP ^{[1
]}

Tabei, J ^{[1
]}

Shiotsuki, M ^{[1
]}

Sanda, F ^{[1
]}

Masuda, T ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Kyoto 6158510, Japan

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2004年 / 205卷 / 08期

关键词：

conformational transition; conjugated polymers; helix; polyacetylenes; N-propargylamides; random coil;

D O I：

10.1002/macp.200400001

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Copolymerization of two N-propargylamides bearing pendent groups with different lengths [monomer 4, HC≡CCH2NHCO(CH2) 4H; monomer 8, HC≡CCH2NHCO(CH2) 8H] was carried out and the conformational transition behavior of copolymers with different compositions was examined systematically. The copolymers could form relatively stable helices even though both of the corresponding homopolymers, poly(4) and poly(8), could not take a stable helical conformation under the same conditions. The helix content of copolymers reached a maximum when the content of monomer 8 was 61%. These results are explained in terms of the idea that the copolymers have higher cis-content and that the intramolecular hydrogen bonding is more effective in these copolymers compared with the corresponding homopolymers.

引用

页码：1103 / 1107

页数：5

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