11-Mercaptoundecanoic acid functionalized gold nanoclusters as fluorescent probes for the sensitive detection of Cu^(2＋) and Fe^(3＋) ions  

作　　者：Zhiqun Bai Xiangling Ren Zhen Gong Chenxi Hao Yongmei Chen Pingyu Wan Xianwei Meng 

机构地区：[1]National Fundamental Research Laboratory of New Hazardous Chemicals,Beijing University of Chemical Technology, Beijing 100029, China [2]Laboratory of Controllable Preparation and Application of Nanomaterials,CAS Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Chinese Chemical Letters》2017年第9期1901-1904,共4页中国化学快报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.61571426,61671435);the National Key Technology R&D Program(No.2015BAI23H00);Beijing Natural Science Foundation(No.4161003);Beijing Key Laboratory of Environmentally Harmful Chemical Analysis

摘　　要：Metal ions are physiologically essential,but excessive metal ions may cause severe risk to plants and animals.Here,we prepared gold nanoclusters（Au NCs） protected by 11-mercaptoundecanoic acid（11-MUA）,which have excellent fluorescence properties for the detection of metal ions.The results showed that the copper ions（Cu^（2＋）） and iron ions（Fe^（3＋）） in the solution have obvious quenching effect on the fluorescence intensity of Au NCs.The detection range of Fe^（3＋） was 0.8-4.5 mmol/L（R^2= 0.992） and 4.5-11.0 mmol/L（R^2= 0.997）.And Cu^（2＋） has a lower linear range（0.1-1.0 mmol/L,R2= 0.993）.When EDTA was added into the reaction system,it was observed that the quenching effect of Cu^（2＋） and Fe^（3＋）on Au NCs showed different phenomenon.Then,the effect of metal ions on the fluorescence of Au NCs was investigated.The selective detection of Cu（2＋） was achieved by EDTA masking of Fe^（3＋）.In addition,we realized the metal ions detection application of Au NCs in the serumMetal ions are physiologically essential,but excessive metal ions may cause severe risk to plants and animals.Here,we prepared gold nanoclusters（Au NCs） protected by 11-mercaptoundecanoic acid（11-MUA）,which have excellent fluorescence properties for the detection of metal ions.The results showed that the copper ions（Cu^（2＋）） and iron ions（Fe^（3＋）） in the solution have obvious quenching effect on the fluorescence intensity of Au NCs.The detection range of Fe^（3＋） was 0.8-4.5 mmol/L（R^2= 0.992） and 4.5-11.0 mmol/L（R^2= 0.997）.And Cu^（2＋） has a lower linear range（0.1-1.0 mmol/L,R2= 0.993）.When EDTA was added into the reaction system,it was observed that the quenching effect of Cu^（2＋） and Fe^（3＋）on Au NCs showed different phenomenon.Then,the effect of metal ions on the fluorescence of Au NCs was investigated.The selective detection of Cu（2＋） was achieved by EDTA masking of Fe^（3＋）.In addition,we realized the metal ions detection application of Au NCs in the serum

关 键 词：Gold nanoclusters Copper ions Iron ions Detection 

分 类 号：O657.3[理学—分析化学]