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Issue 30, 2012
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Maltose-based gelators having azobenzene as light-sensitive unit

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Abstract

Three light-sensitive amphiphiles, based on azobenzene, have been synthesized as supramolecular gelators. A hydrophobic chain with an azobenzene group incorporated at different positions was click coupled to a maltose polar head by a copper(I)-catalysed azidealkyne [3 + 2] cycloaddition. The liquid crystalline and gel properties of these azo-amphiphilic materials have been studied. Two of these azo-gelators containing maltose give rise to stable gels in water or in a mixture of water and DMSO at room temperature. The chiral supramolecular assemblies of these gelators have been characterised by NMR, electron microscopy and circular dichroism (CD). The light-response of azo-amphiphiles in supramolecular gels has been studied. Also azo-gels, which contained mixtures of the azo-amphiphilic compounds and a similar structural hydrogelator, have been investigated.

Graphical abstract: Maltose-based gelators having azobenzene as light-sensitive unit

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Publication details

The article was received on 19 Jul 2012, accepted on 20 Sep 2012 and first published on 18 Oct 2012


Article type: Paper
DOI: 10.1039/C2RA21506C
Citation: RSC Adv., 2012,2, 11419-11431
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    Maltose-based gelators having azobenzene as light-sensitive unit

    M. J. Clemente, R. M. Tejedor, P. Romero, J. Fitremann and L. Oriol, RSC Adv., 2012, 2, 11419
    DOI: 10.1039/C2RA21506C

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