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Issue 5, 2017
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Thermal annealing behaviour and gel to crystal transition of a low molecular weight hydrogelator

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Abstract

The thermal annealing behaviour of an electrolyte-triggered calixarene hydrogelator is found to depend strongly on the specific metal chloride used. While the lithium chloride gel showed typical gel–sol transitions as a function of temperature, the magnesium chloride gel was found to repeatedly strengthen with heat–cool cycles. Structural investigations using small-angle neutron scattering, and scanning probe microscopy, suggest that the annealing behaviour is associated with a change in morphology of the fibrous structures supporting the gel. On prolonged standing at room temperature, the magnesium chloride gel underwent a gel–crystal transition, with the collapsing gel accompanied by the deposition of crystals of a magnesium complex of the proline-functionalised calix[4]arene gelator.

Graphical abstract: Thermal annealing behaviour and gel to crystal transition of a low molecular weight hydrogelator

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Publication details

The article was received on 28 Oct 2016, accepted on 30 Dec 2016 and first published on 05 Jan 2017


Article type: Paper
DOI: 10.1039/C6SM02431A
Citation: Soft Matter, 2017,13, 1006-1011
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    Thermal annealing behaviour and gel to crystal transition of a low molecular weight hydrogelator

    E. C. Barker, A. D. Martin, C. J. Garvey, C. Y. Goh, F. Jones, M. Mocerino, B. W. Skelton, M. I. Ogden and T. Becker, Soft Matter, 2017, 13, 1006
    DOI: 10.1039/C6SM02431A

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