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On the origin of helical mesostructures.

On the origin of helical mesostructures.

Authors :
Yang S
Zhao L
Yu C
Zhou X
Tang J
Yuan P
Chen D
Zhao D
Source :
Journal of the American Chemical Society [J Am Chem Soc] 2006 Aug 16; Vol. 128 (32), pp. 10460-6.
Publication Year :
2006

Abstract

The investigation on the formation mechanism of helical structures and the synthesis of helical materials is attractive for scientists in different fields. Here we report the synthesis of helical mesoporous materials with chiral channels in the presence of achiral surfactants. More importantly, we suggest a simple and purely interfacial interaction mechanism to explain the spontaneous formation of helical mesostructures. Unlike the proposed model for the formation of helical molecular chains or surpramolecular packing based on the geometrically motivated model or the entropically driven model, the origin of the helical mesostructured materials may be attributed to a morphological transformation accompanied by a reduction in surface free energy. After the helical morphology is formed, the increase in bending energy together with the derivation from a perfect hexagonal mesostructure may limit the curvature of helices. Our model may be general and important in the designed synthesis of helical mesoporous materials.

Details

Language :
English
ISSN :
0002-7863
Volume :
128
Issue :
32
Database :
MEDLINE
Journal :
Journal of the American Chemical Society
Publication Type :
Academic Journal
Accession number :
16895411
Full Text :
https://doi.org/10.1021/ja0619049