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首页> 外文期刊>Advanced Functional Materials >A supramolecular chiroptical switch using an amorphous azobenzene polymer
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A supramolecular chiroptical switch using an amorphous azobenzene polymer

机译：使用无定形偶氮苯聚合物的超分子手性开关

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摘要

Supramolecular chirality has been optically induced in an achiral epoxy-based polymer containing photoresponsive azobenzene groups. The origin of this effect is the long-range helical arrangement of the azobenzenes, which extends through the entire thickness of the film. The helicity induced by the handedness of the laser can be reversibly switched by alternately exposing the film to a 488 nm laser with right- and left-handed elliptical polarization. The chiral properties of these films have been characterized by circular dichroism spectroscopy and optical rotation. After five switching cycles, the fatigue resistance is seen to depend on the absorption wavelength of the film, probably due to differences in the photoresponsive speed of the azobenzenes and the polymeric segments.
机译：在包含光响应性偶氮苯基团的非手性环氧基聚合物中，光学诱导了超分子手性。这种作用的根源是偶氮苯的长程螺旋排列，它延伸穿过薄膜的整个厚度。通过交替地将膜暴露于具有右手和左手椭圆偏振的488 nm激光，可以可逆地切换由激光的手感引起的螺旋度。这些膜的手性已通过圆二色性光谱和旋光性表征。经过五个开关周期后，疲劳强度取决于薄膜的吸收波长，这可能是由于偶氮苯和聚合物链段的光响应速度不同所致。

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