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Coiled‐Coil Gel Nanostructures of Oligo( p ‐phenylenevinylene)s: Gelation‐Induced Helix Transition in a Higher‐Order Supramolecular Self‐Assembly of a Rigid π‐Conjugated System
Author(s) -
George Subi J.,
Ajayaghosh Ayyappanpillai,
Jonkheijm Pascal,
Schenning Albertus P. H. J.,
Meijer E. W.
Publication year - 2004
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.200453874
Subject(s) - folding (dsp implementation) , supramolecular chemistry , helix (gastropod) , self assembly , conjugated system , macromolecule , crystallography , order (exchange) , materials science , nanostructure , chemistry , nanotechnology , polymer , crystal structure , organic chemistry , ecology , biochemistry , finance , snail , electrical engineering , economics , biology , engineering
Left‐handed‐helical nanoropes are formed from higher‐order self‐assemblies of chiral aggregates during the gelation of a rigid π‐conjugated oligo( p ‐phenylenevinylene) with remote chiral handles (see picture; R=C 12 H 25 ). The concentration‐ and temperature‐dependent CD‐signal changes observed for these assemblies are indicative of a helix transition. This process is reminiscent of the folding and unfolding of helical biological macromolecules.