期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 12, 页码 4208-4212出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b13605
关键词
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资金
- JSPS KAKENHI [JP26107013, JP15K21725, JP16K17896]
- National Science Foundation [DMR-1508099]
- Grants-in-Aid for Scientific Research [26107013] Funding Source: KAKEN
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 la 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.
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