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

共 36 条

[1] Statistical thermodynamics of helix-coil transitions in biopolymers [J].

Bloomfield, VA .

AMERICAN JOURNAL OF PHYSICS, 1999, 67 (12) :1212-1215

[2]

Cheon KS, 2000, ANGEW CHEM INT EDIT, V39, P1482, DOI 10.1002/(SICI)1521-3773(20000417)39:8<1482::AID-ANIE1482>3.0.CO

[3]

2-7

[4] Conformational transition between random coil and helix of poly(N-propargylamides) [J].

Deng, JP ;

Tabei, J ;

Shiotsuki, M ;

Sanda, F ;

Masuda, T .

MACROMOLECULES, 2004, 37 (05) :1891-1896

[5] OPTICALLY-ACTIVE POLYSILANE HOMOPOLYMER - SPECTROSCOPIC EVIDENCE OF DOUBLE-SCREW-SENSE HELICAL SEGMENTATION AND RECONSTRUCTION OF A SINGLE-SCREW-SENSE HELIX BY THE CUT-AND-PASTE TECHNIQUE [J].

FUJIKI, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (26) :11976-11981

[6] A correlation between global conformation of polysilane and UV absorption characteristics [J].

Fujiki, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (31) :7424-7425

[7]

Green MM, 1999, ANGEW CHEM INT EDIT, V38, P3139

[8] Highly screw-sense selective polymerization of 1,2-diisocyano-3,6-di-p-tolylbenzene initiated by optically active binaphthylpalladium(II) complexes [J].

Ito, Y ;

Ohara, T ;

Shima, R ;

Suginome, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (38) :9188-9189

[9] First optically active diarylpolysilanes:: Facile helical screw sense control with only (S)-enantiopure side chains [J].

Koe, JR ;

Fujiki, M ;

Nakashima, H .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (41) :9734-9735

[10] Synthesis and hierarchical structures of amphiphilic polyphenyl acetylenes carrying L-valine pendants [J].

Li, BS ;

Cheuk, KKL ;

Ling, LS ;

Chen, JW ;

Xiao, XD ;

Bai, CL ;

Tang, BZ .

MACROMOLECULES, 2003, 36 (01) :77-85

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