Highly selective detection of copper(Ⅱ) by a “ligand-free” conjugated copolymer in nucleophilic solvents  

作　　者：Weixing Deng Pengfei Sun Quli Fan Lei Zhang Tsuyoshi Minami 

机构地区：[1]Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,China [2]Institute of Industrial Science,The University of Tokyo,Meguro-ku,Tokyo 153-8505,Japan

出　　处：《Frontiers of Chemical Science and Engineering》2020年第1期105-111,共7页化学科学与工程前沿（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2015CB932200);the National Natural Science Foundation of China(Grant Nos.21604042,61378081,21574064,and 21674048);Synergetic Innovation Center for Organic Electronics and Information Displays,Jiangsu National Synergetic Innovation Center for Advanced Materials,the Natural Science Foundation of Jiangsu Province of China(No.BK20150843);NUPTSF(Nos.NY215017,NY211003,and NY215080);the Innovation Program for Postgraduates Research of Colleges and Universities of Jiangsu Province(No.CXZZ12-0459).

摘　　要：The synthesis of N-cyclohexyl carbamate-attached fluorene-alt-phenylene copolymer(PFPNCC)and the use of PFPNCC as a“ligand-free”fluorescent chemosensor for Cu(Ⅱ)are described.Addition of Cu(Ⅱ)can efficiently quench the fluorescence of PFPNCC in nucleophilic solvents such as DMF and DMSO,but not in low nucleophilic solvents such as 1,4-dioxane and THF.Ultraviolet-visible spectra of the mixture of the conjugated polymer and Cu(Ⅱ)indicate the presence of a reduced Cu(Ⅰ)ion in the solution.Furthermore,fluorescence recovery of PFPNCC observed at low temperature suggests that the quenching and reducing mechanism is most probably due to a photo-induced electron transfer from excited PFPNCC to Cu(Ⅱ).Our findings provide a novel strategy for highly selective conjugated polymer-based chemosensors for various target analytes,albeit“ligand-free”.

关 键 词：LIGAND-FREE FLUORESCENT chemosensor COPPER photo-induced ELECTRON TRANSFER 

分 类 号：O62[理学—有机化学]