Controlled synthesis of silver nanoparticles from polyoxometalates-immobilized poly(4-vinylpyridine) brushes

查看全文 作　　者：Hang [1]Bian;Xuejian [1]Zhang;Hongkai [1]Zhao;Ning [2]Zhang 机构地区：[1]School of Material Science and Engineering,Jilin Jianzhu University,Changchun 130118,China;[2]Department of Chemistry,Northeast Normal University,Changchun 130024,China 出　　处：《Chinese Chemical Letters》索引2019年第30卷第5期,共3页 基　　金：The financial support of this work by Department of Science and Technology of Jilin Province(Nos.20180101196JC and20180101170JC) 摘　　要：This contribution reports the immobilization of polyoxometalate(POM)into poly(4-vinyl pyridine)(P4 VP)brushes and the controlled reduction of silver ions,in-situ generating metal nanoparticles in the brushes.P4 VP brushes were straightforwardly created by UV-assisted photopolymerization of 4-vinyl pyridine(4VP)on silicon or glass substrates.Phosphotungstic acid(H3 PW12 O40),one of the most widely used Keggin-type POM was anchored onto these pyridine moieties through electrostatic interaction,leading to the P4 VP/POM hybrid brushes.The immobilized POM was further reduced to heteropolyblue,which could be used to generate silver nanoparticles in a controlled fashion.AFM,UV-vis and IR characterization indicate that P4 VP brushes not only provide an efficient platform in the controlled preparation of Ag nanoparticles,but also efficiently disperse and stabilize POM,thus preventing the aggregation of the generated Ag nanoparticles. 关 键 词：Polymer BRUSHES POLYOXOMETALATE Ag nanoparticles GRAFTING POLYMERIZATION