Electrochemiluminescence in Thermo-Responsive Hydrogel Films with Tunable Thickness  

作　　者：Haidong Li Valérie Ravaine Neso Sojic 

机构地区：[1]Univ.Bordeaux,Bordeaux INP,ISM CNRS UMR 5255,Site ENSCBP,33607 Pessac,France [2]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China

出　　处：《Journal of Analysis and Testing》2020年第2期107-113,共7页分析检测（英文）

基　　金：supported by the Agence Nationale de la Recherche(NEOCASTIP ANR-15-CE09-0015-03);HL acknowledges the Natural Science Foundations of Jiangsu Province(No.BK20180893).

摘　　要：Electrochemiluminescence(ECL)has attracted considerable interest for many applications such as microscopy,(bio)analysis,light-emitting materials or devices.In this work,we report the fabrication and characterization of ECL-active hydrogel films with tunable thickness.The redox films were prepared by electrochemically-assisted radical polymerization by potential cycling of a PBS solution containing the monomer N-isopropylacrylamide,the initiator potassium persulfate,the cross-linker N,N′-methylenebis(acrylamide)and the Ru(bpy)3 monomer.The deposits were easily prepared in a rapid and well-controlled one-step procedure.The resulting homogeneous films are composed of a poly(N-isopropylacrylamide)(pNIPAM)matrix,which incorporates covalently[Ru(bpy)_(3)]^(2+)centers.The thickness and the number of ECL-active sites is tuned by control-ling the number of voltammetric scans.The deposited pNIPAM films are permeable to water-soluble chemicals such as the coreactant tri-n-propylamine(TPrA).The voltammetric characterization shows a continuous increase of the number of redox-active sites.Results indicate that ECL signals are proportional to the number of electrodeposited[Ru(bpy)_(3)]^(2+)centers.Such approach combining ECL and stimuli-responsive hydrogels open exciting prospects for developing new(bio)sensing materials.

关 键 词：ELECTROCHEMILUMINESCENCE HYDROGEL pNIPAM film [Ru(bpy)_(3)]^(2+) COREACTANT Electrochemically-assisted radical polymerization 

分 类 号：O657.1[理学—分析化学]