A temperature responsive smart catalytic system based on SBA-15/poly(N,N-dimethylaminoethylmethacrylate) decorated with gold nanoparticles (NPs) was prepared. The surface graft polymerization of 2-dimethylaminoethyl methacrylate on well-structured mesoporous silica NPs was done by atom transfer radical polymerization technique in aqueous alcohol media. In situ generation of gold NPs was achieved in controlled condition. The catalytic activity was evaluated by monitoring the reduction reaction of 4-nitrophenol at various temperatures. The catalytic activity of the NPs showed a deviance from the expected Arrhenius trend at different temperatures. Above the cloud point of the grafted polymer at a given pH condition, the rate constant of the catalytic reaction dropped sharply due to shrinkage of the polymer and transition to hydrophobic state.

基于SBA-15 / poly（N，N的温度响应智能催化系统制备了用金纳米颗粒（NP）装饰的（甲基丙烯酸二甲基氨基乙酯）。甲基丙烯酸2-二甲基氨基乙基酯在结构良好的介孔二氧化硅纳米粒子上的表面接枝聚合反应是通过原子转移自由基聚合技术在含水醇介质中进行的。在控制条件下原位生成金纳米颗粒。通过监测4-硝基苯酚在不同温度下的还原反应来评价催化活性。在不同温度下，NPs的催化活性显示出与预期的Arrhenius趋势不同。在给定的pH条件下，在接枝聚合物的浊点以上，由于聚合物的收缩和向疏水态的转变，催化反应的速率常数急剧下降。