Spiropyran-incorporated honeycomb porous films with reversible multistimuli-responsive properties
作者：Junwen Xie, Junming Zhang, Yingyi Ma*, Yuhang Han, Jingfang Li*, Min Zhu
關(guān)鍵字：breath figure method, porous film, spiropyran, stimuli-responsive
論文來源：期刊
具體來源：Journal of Materials Chemistry C
發(fā)表時(shí)間：2022年
Spiropyran (SP)-incorporated honeycomb-structured porous film which combines the attractive features of honeycomb-patterned porous structure with the excellent stimulus responsiveness of SP was successfully prepared by the simple, low-cost and environmentally friendly static breath figure method. Reversible variations in UV absorption and color of the porous film response to UV light, heating and pH were found, demonstrating their photo-, thermo- and acidochromic properties benefit from the isomerization of the doped SP. Stronger and faster response was verified for the honeycomb porous film compared to the flat one through analyzing their isomerization kinetics, confirming the superiority of the honeycomb structure in stimuli-responsive materials. In addition, good photo-/thermo-fatigue resistance of the honeycomb film illustrating the maintainence of the photo/thermal-stability, photo/thermal-switchability and reversibility of the doped SP. Overall, based on the responsiveness of the film color and properties to light, heat and pH, the applications of SP-modified honeycomb film in acid vapor detection, photo/thermo- riven rewritable pattern, information decryption and encryption, molecular logic gate, wettability regulation and milk spoilage detection were realized.