A dramatically increased rate of cis–trans isomerization of an azobenzene derivative dissolved in liquids (e.g. benzonitrile) and liquid crystals relative to the corresponding thermally activated process can be achieved by applying a low static electric field (see picture) without adding any supporting electrolyte. This electric-field-induced isomerization can affect the electrooptical behavior of azobenzene-doped liquid crystals.
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Tong et al. (2008) studied this question.
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