【作者】 王冬梅； 刘秉鑫； 吕建华； 吕长利；

【Author】 Dongmei Wang;Bingxin Liu;Jianhua Lü;Changli Lü;Department of Chemistry, University of Northeast Normal;School of mechanical engineering, Qinghai University;

【机构】 东北师范大学化学院； 青海大学机械工程学院；

【摘要】 利用具有环硫基团的甲基丙烯酸环硫丙酯（ETMA）和具有热敏性质的异丙基丙烯酰胺（NIPAM）单体的无规共聚,合成了一种新型的热敏性大分子配体（S-CPL）。以S-CPL为配体,通过不同的方法原位（in-situ）还原制得了金纳米微粒Au@S-CPL。其中,碱还原法可获得粒径小于2 nm的荧光金纳米团簇。所得到的金纳米团簇Au@S-CPL可以进一步应用于对硝基苯酚的催化还原研究,结果表明,表面存在Au³⁺的金纳米团簇对NaB H4还原硝基苯酚的反应体系表现出良好的催化活性。并且S-CPL的热敏性还使金纳米团簇的催化活性具有热"开关"可控性。更多还原

【Abstract】 A novel random copolymer of poly（N-isopropylacrylamide-co-2,3-epithiopropyl methacrylate）P（NIPAM-co-ETMA）（S-CPL） containing NIPAM units and bearing an episulfide moiety was prepared as thermo-responsive polymer ligand,which was further employed as scaffolds to in-situ prepare gold nanoparticles.The multifunctional fluorescent properties of gold nanoclusters with the diameter less than 2 nm was obtained via a alkaline induced reduction of Au³⁺.These nanoclusters capped with Au⁺ on the surface were able to efficiently catalyze the reduction of 4-nitrophenol to 4-aminophenol by NaBH₄ in an aqueous environment.As the S-CPL has the sensitive thermally triggered response,the catalytic activity can be controlled by thermo-switching.更多还原