文献类型：期刊文献

英文题名：Poly(acetylene azobenzene oligoethylene glycol) with Concurrently Reversible Photomechanical and Photoelectric Responsiveness upon Ultraviolet Irradiation

作者：Tao, Xinfeng[1];Shen, Ciyin[1];Hua, Qixia[1];Jin, Sheng[1];Yao, Yuan[1];Lin, Shaoliang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2025

卷号：7

期号：8

起止页码：5212

外文期刊名：ACS APPLIED POLYMER MATERIALS

收录：;EI(收录号：20251518228760);WOS:【SCI-EXPANDED(收录号:WOS:001465843900001)】；

基金：This work was supported by National Natural Science Foundation of China (Grants 52073094, 52273291, and 52325308) and Natural Science Foundation of Shanghai (Grant 24ZR1416500).

语种：英文

外文关键词：azopolymer; polyacetylene; photomechanicalresponsiveness; photoelectric responsiveness; photothermalresponsiveness

摘要：Most multiple-responsive materials are limited to a single response mode to a stimulus. Herein, we present a unique conjugate azopolymer, poly(acetylene azobenzene oligoethylene glycol) (P(AAzo-OEG4)), that concurrently exhibits both reversible photomechanical and photoelectric responsiveness upon ultraviolet (UV) light stimulus. This azopolymer features a polyacetylene backbone adorned with azobenzene pendants and terminated with oligoethylene glycol (OEG) tails. The integration of a conjugated skeleton with azobenzene pendants endows the polymer with specific phototunable mechanical and electrical responsiveness, along with a photothermal effect that enhances its photomobile and photoelectric performance. The OEG tails promote the solubility and film-forming capabilities of the polymer. When doped with iodine, P(AAzo-OEG4) demonstrates a repeatable doubling of conductivity upon UV irradiation, owing to the photoelectric and photothermal effect. Remarkably, P(AAzo-OEG4) exhibits reversible three-state conductivity in response to cyclic irradiation with UV light, blue light, and natural light, making it a promising candidate for photocontrolled logical sensors. Furthermore, P(AAzo-OEG4)/polyethylene (PE) and P(AAzo-OEG4)/polyimide (PI) composite films show amphotropic bending due to the isomerization-induced volume expansion. These two types of composite films could be configured as a photodriven gripper and a photocontrolled switch, respectively. This study provides a straightforward strategy for fabricating photoactuators and photoelectric devices by using a single material, opening up promising avenues in the design of multifunctional photosensitive polymers.