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Control of Main‐Chain Stiffness of a Helical Poly(phenylacetylene) by Switching On and Off the Intramolecular Hydrogen Bonding through Macromolecular Helicity Inversion
Author(s) -
Okoshi Kento,
Sakurai Shinichiro,
Ohsawa Sousuke,
Kumaki Jiro,
Yashima Eiji
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200603663
Subject(s) - phenylacetylene , intramolecular force , hydrogen bond , helicity , macromolecule , polymer chemistry , twist , alkyl , materials science , polymer , intermolecular force , chain (unit) , inversion (geology) , chemistry , polymer science , crystallography , photochemistry , stereochemistry , organic chemistry , molecule , physics , composite material , paleontology , biochemistry , geometry , mathematics , particle physics , structural basin , astronomy , biology , catalysis
A hard twist : A helical poly(phenylacetylene) with L ‐ or D ‐alanine pendants with a long alkyl chain showed an unprecedented change in the main‐chain stiffness accompanied by inversion of the helical sense of the polymer, resulting from the “on and off” fashion of the intramolecular hydrogen‐bonding networks in polar and nonpolar solvents.