Location of the Azobenzene Moieties within the Cross-Linked Liquid-Crystalline Polymers Can Dictate the Direction of Photoinduced Bending

We present a simple way to control the photoinduced bending direction of azobenzene-containing cross-linked liquid-crystalline polymers. By changing the location of the photoactive azobenzene moieties from cross-links to side-chains, the bending direction of the sample is reversed under identical ir...

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Bibliographic Details
Published in:ACS macro letters 2012-01, Vol.1 (1), p.96-99
Main Authors: Priimagi, Arri, Shimamura, Aki, Kondo, Mizuho, Hiraoka, Tomohiro, Kubo, Shoichi, Mamiya, Jun-Ichi, Kinoshita, Motoi, Ikeda, Tomiki, Shishido, Atsushi
Format: Article
Language:English
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Summary:We present a simple way to control the photoinduced bending direction of azobenzene-containing cross-linked liquid-crystalline polymers. By changing the location of the photoactive azobenzene moieties from cross-links to side-chains, the bending direction of the sample is reversed under identical irradiation conditions. In addition to providing a versatile route toward directionality control of the photoinduced macroscopic motions, this observation highlights the complicated nature of the photomechanical response of azobenzene-containing cross-linked liquid-crystalline polymers, showing that the photomobile behavior can be determined by seemingly small details on the materials design.
ISSN:2161-1653
2161-1653
DOI:10.1021/mz200056w