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Star-Shaped Oligo(p-phenylenevinylene) Substituted Hexaarylbenzene: Purity, Stability, and Chiral SeIf-assembIy.
- Source :
-
Journal of the American Chemical Society . 12/26/2007, Vol. 129 Issue 51, p16190-16196. 7p. 5 Diagrams, 2 Graphs. - Publication Year :
- 2007
-
Abstract
- 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 π-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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027863
- Volume :
- 129
- Issue :
- 51
- Database :
- Academic Search Index
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 28843209
- Full Text :
- https://doi.org/10.1021/ja0765417