Copper nanocluster coupling europium as an off-to-on fluorescence probe for the determination of phosphate ion in water samples
文献类型:期刊论文
作者 | Cao, Haiyan1,3; Chen, Zhaohui2; Huang, Yuming1 |
刊名 | TALANTA |
出版日期 | 2015-10-01 |
卷号 | 143页码:450-456 |
ISSN号 | 0039-9140 |
关键词 | Copper Nanoclusters Phosphate Ions Fluorescence Probe Lanthanide Ions |
DOI | 10.1016/j.talanta.2015.05.024 |
英文摘要 | This paper reports an "off-to-on" fluorescence (FL) probe for sensitively and selectively detecting phosphate ions (Pi's). Fabrication of the probe was based on the competition between Pi's and tannic acid-stabilized copper nanoclusters (TA-Cu NCs) for Eu3+ binding. The addition of Eu3+ ions to TA-Cu NCs triggered the aggregation of TA-Cu NCs, which quenched the FL of TA-Cu NCs. After Pi addition, the aggregated TA-Cu NCs solubilized into the aqueous solution to facilitate the Pi-triggered dispersion of TA-Cu NCs. This phenomenon was due to the stronger binding ability between Pi's and Eu3+ than that between TA and Eu3+, leading to FL recovery of Cu NCs. The degree of redispersion of TA-Cu NCs was directly related to Pi concentration. Thus, Pi concentration can be quantitatively determined by the change in FL of the TA-Cu NCs dispersion. Under the optimized conditions, the change in FL presented a linear relationship with Pi concentration from 0.07 mu mol L-1 to 80 mu mol L-1. The limit of detection for Pi was 9.6 x 10(-3) mu mol L-1 at a signal-to-noise ratio of 3. For Pi determination in real samples, only 1 mL water sample was needed. The proposed probe was highly sensitive, free from the interference of other common species in aqueous media, and particularly useful for the fast and simple diagnosis of water-eutrophication extent. (C) 2015 Elsevier B.V. All rights reserved. |
资助项目 | National Natural Science Foundation of China[21277111] ; Fundamental Research Funds for the Central Universities[XDJK2013D001] ; Fundamental Research Funds for the Central Universities[XDJK2013A022] |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000357750200063 |
源URL | [http://119.78.100.138/handle/2HOD01W0/1764] |
专题 | 中国科学院重庆绿色智能技术研究院 |
作者单位 | 1.Southwest Univ, Coll Chem & Chem Engn, Minist Educ, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Chongqing 400715, Peoples R China 2.Southwest Univ, Basic Dept Rongchang Campus, Chongqing 402460, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
推荐引用方式 GB/T 7714 | Cao, Haiyan,Chen, Zhaohui,Huang, Yuming. Copper nanocluster coupling europium as an off-to-on fluorescence probe for the determination of phosphate ion in water samples[J]. TALANTA,2015,143:450-456. |
APA | Cao, Haiyan,Chen, Zhaohui,&Huang, Yuming.(2015).Copper nanocluster coupling europium as an off-to-on fluorescence probe for the determination of phosphate ion in water samples.TALANTA,143,450-456. |
MLA | Cao, Haiyan,et al."Copper nanocluster coupling europium as an off-to-on fluorescence probe for the determination of phosphate ion in water samples".TALANTA 143(2015):450-456. |
入库方式: OAI收割
来源:重庆绿色智能技术研究院
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