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Issue 16, 2017
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Gelation behaviour and gel properties of two-component organogels containing a photoresponsive gelator

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Abstract

Herein, we report the gelation behaviour and gel properties of two-component organogels consisting of 1,4-bis[(3,4-bisoctyloxyphenyl) hydrozide] phenylene (BPH-8) and a photoresponsive gelator 4-[3,5-(bisoctyloxyphenyl)]-9-anthracene formyl hydrazine (MB8). It was demonstrated that the mixture of BPH-8 and MB8 showed self-sorted aggregation behaviour in ethanol. A gradient cooling procedure was used to obtain self-sorted gels of BPH-8 and MB8. Kinetics of gelation of the two component gels showed that Df values of MB8 fibers decreased due to the presence of BPH-8 gel. The two-component gels showed visible light (λvisible light = 350–570 nm) induced gel–gel transitions due to the orthogonal self-assembly of two gelators through the transcis conformation transition of –C[double bond, length as m-dash]N– bond of MB8 component. In addition, the stable patterned two-component gel was achieved using a special shape mask, which enabled the gels to be irradiated by visible light in a particular area. The irradiated gels showed weak emission, reduced storage modulus, a shorter linear viscoelastic region, and higher wetting angle compared to that unirradiated region due to the collapse of the MB8 aggregates under visible light.

Graphical abstract: Gelation behaviour and gel properties of two-component organogels containing a photoresponsive gelator

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Publication details

The article was received on 12 Apr 2017, accepted on 06 Jul 2017 and first published on 07 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ01215B
Citation: New J. Chem., 2017,41, 8614-8619
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    Gelation behaviour and gel properties of two-component organogels containing a photoresponsive gelator

    X. Che, B. Bai, T. Zhang, C. Zhang, C. Zhang, P. Zhang, H. Wang and M. Li, New J. Chem., 2017, 41, 8614
    DOI: 10.1039/C7NJ01215B

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