Issue 16, 2012
From the journal:

Journal of Materials Chemistry

Formation of reactive aerogels and their reactivity in aqueous media. Wettability induces hydrophobic vs. hydrophilic selectivity†

Thi-Thanh-Tam Nguyen,a   François-Xavier Simon,a   Niaz Ali Khan,a   Marc Schmutza  and  Philippe J. Mésini*a  

* Corresponding authors

a Institut Charles Sadron, CNRS UPR 022, Université de Strasbourg, 23 rue du Loess BP 84047, 67034 Strasbourg Cedex 2, France
E-mail: mesini@ics-cnrs.unistra.fr
Fax: +33 388 414 099
Tel: +33 388 414 070

Abstract

Aerogels were formed from organogels of diamides by a supercritical drying process. The used organogels are composed of self-assembled nanotubes of 29 nm in diameter. SEM studies reveal that the resulting aerogels are made of fibers with diameters comprised between 40 and 200 nm, corresponding to bundles of the starting nanotubes, while WAXS indicated that most of the crystalline structure detected in the self-assemblies of the starting gel is preserved in aerogels. Two different reactive diamides bearing respectively an alkynyl and an azido function were investigated. We have tested the reactivity of the resulting aerogels under copper-catalyzed azide–alkyne cycloaddition in aqueous solution. These aerogels react easily with hydrophobic compounds although reactants are in separate phases. In contrast, they do not react with hydrosoluble compounds, because of their superhydrophobicity.

Graphical abstract: Formation of reactive aerogels and their reactivity in aqueous media. Wettability induces hydrophobic vs. hydrophilic selectivity

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Article information

DOI
https://doi.org/10.1039/C2JM30184A
Article type
Communication
Submitted
10 Jan 2012
Accepted
22 Feb 2012
First published
16 Mar 2012

J. Mater. Chem., 2012,22, 7712-7714

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Formation of reactive aerogels and their reactivity in aqueous media. Wettability induces hydrophobic vs. hydrophilic selectivity

T. Nguyen, F. Simon, N. A. Khan, M. Schmutz and P. J. Mésini, J. Mater. Chem., 2012, 22, 7712 DOI: 10.1039/C2JM30184A

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