Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/127909
Title: | Supramolecular organization and heterochiral recognition in Langmuir monolayers of chiral azobenzene surfactants |
Author: | Pulido Companys, Alba Albalat Piñol, Rosa Garcia Amorós, Jaume Velasco Castrillo, Dolores Ignés i Mullol, Jordi |
Keywords: | Quiralitat Agents tensioactius Chirality Surface active agents |
Issue Date: | 6-Aug-2013 |
Publisher: | American Chemical Society |
Abstract: | We study the self-assembly of novel azobenzene-based chiral surfactants at the air/water interface, and find that while the pure enantiomers lack the ability to organize in ordered mesophases, the racemic mixture spontaneously forms a hexatic phase at low lateral pressures, which we detect by means of Brewster angle microscopy. This work provides a unique example of heterochiral recognition in which the racemic monolayer is not only condensed with respect to the pure enantiomers, but causes an ordered mesophase to form. Although hexatic order vanishes at high surface pressures, long-range orientational order is regained for all compositions upon monolayer collapse, which proceeds through the formation of birefringent trilayers with a well-defined lateral microstructure, as revealed by atomic force microscopy. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1021/la4006407 |
It is part of: | Langmuir, 2013, vol. 29, num. 31, p. 9635-9642 |
URI: | http://hdl.handle.net/2445/127909 |
Related resource: | https://doi.org/10.1021/la4006407 |
ISSN: | 0743-7463 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) Articles publicats en revistes (Ciència dels Materials i Química Física) |
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File | Description | Size | Format | |
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629466.pdf | 2.79 MB | Adobe PDF | View/Open |
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