标题：Polyoxometalate-Based Photochromic Supramolecular Hydrogels with Highly Ordered Spherical and Cylindrical Micellar Nanostructures
作者：Sun, Na; Wu, Aoli; Yu, Yang; Gao, Xinpei; Zheng, Liqiang
作者机构：[Sun, Na; Wu, Aoli; Yu, Yang; Gao, Xinpei; Zheng, Liqiang] Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Shandong, Peopl 更多
通讯作者：Gao, XP;Zheng, LQ;Gao, Xinpei
通讯作者地址：[Gao, XP; Zheng, LQ]Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Shandong, Peoples R China.
来源：CHEMISTRY-A EUROPEAN JOURNAL
关键词：gels; noncovalent interactions; polyoxometalates; self-assembly;; zwitterions
摘要：Polyoxometalates (POMs) have attracted much attention in the field of photochromic materials. However, POM-based photochromic supramolecular hydrogels with high transparency and good photochromic properties are seldom reported. In this work, a homogenous, optically transparent, injectable, and photochromic supramolecular hydrogel was fabricated through the coassembly of ammonium heptamolybdate (Mo-7) and an imidazolium-based zwitterionic amphiphile (3-(1-hexadecyl-3-imidazolio)propanesulfonate (C16IPS)). The balance between electrostatic attraction and repulsion of Mo-7 clusters and zwitterionic amphiphiles enables them to coassemble into a homogenous and transparent supramolecular hydrogel. By adjusting the molar ratio of C16IPS/Mo-7, ordered spherical micelle-based hydrogels and aligned wormlike micelle-based hydrogels can be obtained. The incorporation of Mo-7 into hydrogels endows these hydrogels with excellent photochromic properties. Specifically, after coassembly with C16IPS, the photochromic ability of hydrogels is significantly enhanced compared with that of a pure aqueous solution of Mo-7. These hydrogels exhibit great potential applications as photochromic materials for the recording of rewritable information.