Control of Photomechanical Crystal Twisting by Illumination Direction

Photomechanical molecular crystals have been investigated as mesoscopic photoactuators. Here, we report how the photomechanical twisting of 1,2-bis­(2-methyl-5-phenyl-3-thienyl)­perfluorocyclopentene (1a) crystals depends on illumination direction. The ribbon-like crystal of 1a could be successfully...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2018-03, Vol.140 (12), p.4208-4212
Main Authors: Kitagawa, Daichi, Tsujioka, Hajime, Tong, Fei, Dong, Xinning, Bardeen, Christopher J, Kobatake, Seiya
Format: Article
Language:English
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Summary:Photomechanical molecular crystals have been investigated as mesoscopic photoactuators. Here, we report how the photomechanical twisting of 1,2-bis­(2-methyl-5-phenyl-3-thienyl)­perfluorocyclopentene (1a) crystals depends on illumination direction. The ribbon-like crystal of 1a could be successfully prepared by a sublimation method. The ribbon crystal exhibited reversible photomechanical crystal twisting upon alternating irradiation with ultraviolet (UV) and visible light. Moreover, changing the UV illumination direction with respect to the crystal resulted in different twisting modes, ranging from helicoid to cylindrical. Control of photomechanical crystal deformation by illumination direction provides a convenient and useful way to generate a variety of photomechanical motions from a single crystal.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.7b13605