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

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• 作者：Arri Priimagi ; Aki Shimamura ; Mizuho Kondo ; Tomohiro Hiraoka ; Shoichi Kubo ; Jun-Ichi Mamiya ; Motoi Kinoshita ; Tomiki Ikeda ; Atsushi Shishido
• 刊名：ACS Macro Letters
• 出版年：2012
• 出版时间：January 17, 2012
• 年：2012
• 卷：1
• 期：1
• 页码：96-99
• 全文大小：230K
• 年卷期：v.1,no.1(January 17, 2012)
• ISSN：2161-1653

文摘

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.