自愈水凝胶
荧光
荧光团
单体
聚合物
螺吡喃
纳米技术
甲基丙烯酸酯
材料科学
高分子化学
光致变色
量子力学
物理
复合材料
作者
Hao Líu,Shuxin Wei,Huabiao Qiu,Beibei Zhan,Qingquan Liu,Wei Lü,Jiawei Zhang,To Ngai,Tao Chen
标识
DOI:10.1002/marc.202000123
摘要
Abstract Substituted naphthalimide (NI) moieties are highly versatile and newly recognized aggregation‐induced emission (AIE) building blocks for many potentially useful smart molecules, polymers, and nanoparticles. However, the introduction of NI fluorophore into cross‐linked polymeric networks to prepare AIE‐active hydrogels still remains underdeveloped. Herein, a novel naphthalimide‐based aggregation‐induced emissive polymeric hydrogel is reported, followed by its proof‐of‐concept applications as fluorescence pattern switch and biomimetic actuator. The hydrogel, bearing semi‐interpenetrating polymer networks, is synthesized starting from N ‐isopropylacrylamide, hydroxyethyl methacrylate, and a newly designed NI monomer (4‐phenoxy‐ N ‐allyl‐1,8‐naphthalimide, PhAN). Rational molecular design for AIE‐active PhAN monomer lies in modification of the NI core with rigid and bulky phenoxy group to break its planarity to produce desirable propeller‐shaped molecular conformation. The as‐prepared hydrogel is proved to be a aggregation‐induced blue‐light‐emitting hydrogel. It also shows volume phase transition behavior and is endowed with thermally responsive synergistic emission and transmittance change, thus enabling simultaneous regulation of two optical properties merely by one single stimulus. These useful advantages further encourage fabrication of several proto‐type fluorescence pattern switching and biomimetic actuating devices. This study may not only enlarge the list of fluorescent hydrogels but also serve as a novel smart optical platform for potential anticounterfeiting, sensing, displaying, or actuating applications.
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