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Issue 92, 2015
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Fast switching from isotropic liquids to nematic liquid crystals: rotaxanes as smart fluids

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Abstract

We examine a solution of rod-like piston-rotaxanes, which can switch their length by external excitation (for example optically) from a short state of length L to a long state of length qL. We show that this solution can exhibit a number of different behaviours. In particular it can rapidly switch from an isotropic to a nematic liquid crystalline state. There is a minimum ratio q* = 1.13 for which transitions from a pure isotropic state to a pure nematic state are possible. We present a phase-switching diagram, which gives the six possible behaviours for this system. It turns out that a large fraction of the phase switching diagram is occupied by the transition from a pure isotropic to a pure nematic state.

Graphical abstract: Fast switching from isotropic liquids to nematic liquid crystals: rotaxanes as smart fluids

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Article information


Submitted
21 Aug 2015
Accepted
23 Sep 2015
First published
23 Sep 2015

Chem. Commun., 2015,51, 16541-16544
Article type
Communication
Author version available

Fast switching from isotropic liquids to nematic liquid crystals: rotaxanes as smart fluids

H. He, E. M. Sevick and D. R. M. Williams, Chem. Commun., 2015, 51, 16541
DOI: 10.1039/C5CC07048A

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