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Issue 11, 2016
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Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change

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Abstract

The self-assembly of perylene bisimide (PBI) dyes bearing oligo ethylene glycol (OEG) units in water affords responsive functional nanostructures characterized by their lower critical solution temperature (LCST). Tuning of the LCST is realized by a supramolecular approach that relies on two structurally closely related PBI–OEG molecules. The two PBIs socially co-assemble in water and the resulting nanostructures exhibit a single LCST in between the transition temperatures of the aggregates formed by single components. This permits to precisely tune the transition from a hydrogel to a lyotropic liquid crystal state at temperatures between 26 and 51 °C by adjusting the molar fraction of the two PBIs. Owing to concomitant changes in PBI–PBI interactions this phase transition affords a pronounced color change with “fluorescence-on” response that can be utilized as a smart temperature sensory system.

Graphical abstract: Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change

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Publication details

The article was received on 20 May 2016, accepted on 13 Jul 2016 and first published on 22 Jul 2016


Article type: Edge Article
DOI: 10.1039/C6SC02249A
Citation: Chem. Sci., 2016,7, 6786-6790
  • Open access: Creative Commons BY license
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    Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change

    D. Görl, B. Soberats, S. Herbst, V. Stepanenko and F. Würthner, Chem. Sci., 2016, 7, 6786
    DOI: 10.1039/C6SC02249A

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