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 

作者机构：National Fundamental Research Laboratory of New Hazardous ChemicalsBeijing University of Chemical Technology Beijing 100029 China Laboratory of Controllable Preparation and Application of NanomaterialsCAS Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2017年第28卷第9期

页      面：1901-1904页

核心收录：

学科分类：07[理学] 070302[理学-分析化学] 0703[理学-化学] 

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 

主　　题：Gold nanoclusters Copper ions Iron ions Detection 

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 serum