Article (Scientific journals)
Star-Shaped Oligo(p-phenylenevinylene) Substituted Hexaarylbenzene: Purity, Stability, and Chiral Self-Assembly
Tomovic, Z.; van Dongen, J.; George, S.J. et al.
2007In Journal of the American Chemical Society, 129 (51), p. 16190-16196
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Abstract :
[en] An oligo(p-phenylenevinylene) (OPV)-substituted hexaarylbenzene has been synthesized and fully characterized. Recycling gel permeation chromatography appeared to be a powerful technique to obtain the OPV molecules in a very pure form. X-ray analysis and polarization optical microscopy revealed that the OPV molecule is plastic crystalline at room temperature with an ordered columnar superstructure. In apolar solvents, the molecules self-assemble via a highly cooperative fashion into right-handed chiral superstructures, which are stable even at high temperatures and low concentration. Atomic force microscopy revealed right-handed fibers with a diameter of 6 nm, indicating p-stacked aggregates; on a silicon oxide substrate, supercoiled chiral structures were observed. STM studies on a liquid-solid interface showed that the star-shaped OPV molecule forms an organized monolayer having a chiral hexagonal lattice.
Disciplines :
Chemistry
Physics
Author, co-author :
Tomovic, Z.
van Dongen, J.
George, S.J.
Xu, H.-L.
Pisula, W.
Leclère, Philippe  ;  Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Smulders, M.M.J.
De Feyter, S.
Meijer, E.W.
Schenning, A.P.H.J.
Language :
English
Title :
Star-Shaped Oligo(p-phenylenevinylene) Substituted Hexaarylbenzene: Purity, Stability, and Chiral Self-Assembly
Publication date :
26 December 2007
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
Publisher :
American Chemical Society, United States - District of Columbia
Volume :
129
Issue :
51
Pages :
16190-16196
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Commentary :
Publié en ligne le 29 novembre 2007
Available on ORBi UMONS :
since 10 June 2010

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