光响应性二芳基乙烯聚合物研究进展

Research Progress of Photo-responsive Dithienylethene Polymers

二芳基乙烯(简称二芳烯)作为一种新的光响应化合物,具有非常好的热稳定性和抗疲劳性能。在不同波长的光(如紫外光和可见光)的作用下,二芳烯化合物会发生开环体与闭环体之间的光致可逆转变。这种开环体与闭环体之间的转变会引起化合物颜色的显著变化,同时还会引起化合物各种性质,如折射率、介电常数、氧化-还原电势的可逆变化,因此二芳烯化合物可用于光存储和光开关等。将二芳烯光响应功能基团引入到聚合物当中,结合聚合物自身的特点则能进一步发挥其功能优势从而进行广泛应用。本文综述了近年来含二芳烯光响应功能基团聚合物的研究进展,并对光响应性二芳烯聚合物今后的发展进行了展望。

As a new type of photoresponsive compound, dithienylethene has excellent thermal stability and fatigue resistance. Irradiation with appropriate wavelength of light, the dithienylethene can undergo reversible photocyclization between colourless open-ring isomer and coloured closed-ring isomer. At the same time, many molecular properties will also be changed reversibly, such as refractive index, dielectric constant, electrochemical properties, and so on. It can be used in optoelectronic devices such as memory media, optical switches and sensors. For practical applications, the dithienylethenes should be incorporated into polymers that can be easily fabricated into films, sheets, or beads. This microreview provides an overview of the prepared dithienylethene based polymers.