Anisotropic bending and twisting behaviour of a twin crystal composed of a diarylethene

Anisotropic bending and twisting behaviour of a twin crystal composed of a diarylethene
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二芳基乙烯双晶的各向异性弯曲和扭曲行为

DOI:
10.1039/d0ce01705a
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发表时间:
2021
期刊:
影响因子:
3.1
通讯作者:
Kobatake Seiya
Kobatake Seiya
中科院分区:
化学3区
文献类型:
--
作者:
Higashiguchi Takuya;Kitagawa Daichi;Kobatake Seiya

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在这里,我们发现由 1,2-双(2-甲基-5-(4-十一烷氧基苯基)-3-噻吩基)-全氟环戊烯 (1a) 组成的晶体表现出不寻常的光机械弯曲。在紫外线(UV)照射下,晶体向入射光弯曲,但弯曲的速度取决于照射方向。当从晶体的左侧和右侧照射时,弯曲的速度彼此不同。我们发现该晶体是“双晶”,经X射线晶体学证实。双晶的弯曲机理可以从双晶组分的含量、二芳基乙烯分子的吸收各向异性以及晶体扭曲的程度来解释。
Here, we found that crystals consisting of 1,2-bis(2-methyl-5-(4-undecyloxyphenyl)-3-thienyl)-perfluorocyclopentene (1a) exhibit unusual photomechanical bending. Upon irradiation with ultraviolet (UV) light, the crystal bent toward the incident light, but the velocity of the bending depended on the illumination directions. When irradiated from the left and right sides of the crystal, the velocities of the bending were different from each other. We found that the crystal is a “twin crystal”, as confirmed by X-ray crystallography. The bending mechanism of the twin crystal can be interpreted from the content of twin components, the absorption anisotropy of diarylethene molecules and the degree of the crystal twisting.
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DOI: --
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