Polyamine-Functionalized Carbon Quantum Dots as Fluorescent Probes for Selective and Sensitive Detection of Copper Ions

被引：898

作者：

Dong, Yongqiang

Wang, Ruixue

Li, Geli

Chen, Congqiang

Chi, Yuwu ^{[1
]}

Chen, Guonan

机构：

[1] Fuzhou Univ, Minist Educ, Key Lab Anal & Detect Food Safety, Fujian Prov Key Lab Anal & Detect Food Safety, Fuzhou 350108, Fujian, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2012年 / 84卷 / 14期

基金：

中国国家自然科学基金;

关键词：

NANOCRYSTALS;

D O I：

10.1021/ac3012126

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel sensing system has been designed for Cu2+ ion detection based on the quenched fluorescence (FL) signal of branched poly(ethylenimine) (BPEI)-functionalized carbon quantum dots (CQDs). Cu2+ ions can be captured by the amino groups of the BPEI-CQDs to form an absorbent complex at the surface of CQDs, resulting in a strong quenching of the CQDs' FL via an inner filter effect. Herein, we have demonstrated that this facile methodology can offer a rapid, reliable, and selective detection of Cu2+ with a detection limit as low as 6 nM and a dynamic range from 10 to 1100 nM. Furthermore, the detection results for Cu2+ ions in a river water sample obtained by this sensing system agreed well with that by inductively couple plasma mass spectrometry, suggesting the potential application of this sensing system.

引用

页码：6220 / 6224

页数：5

共 27 条

[1]

Agustina R. G., 2010, J PHYS CHEM B, V114, P1836

[2] Copper Trafficking Mechanism of CXXC-Containing Domains: Insight from the pH-Dependence of Their Cu(I) Affinities [J].

Badarau, Adriana ;

Dennison, Christopher .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (09) :2983-2988

[3] Luminescent Carbon Nanodots: Emergent Nanolights [J].

Baker, Sheila N. ;

Baker, Gary A. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2010, 49 (38) :6726-6744

[4] Surface functionalized carbogenic quantum dots [J].

Bourlinos, Athanasios B. ;

Stassinopoulos, Andreas ;

Anglos, Demetrios ;

Zboril, Radek ;

Karakassides, Michael ;

Giannelis, Emmanuel P. .

SMALL, 2008, 4 (04) :455-458

[5] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[6] Carbon dots for multiphoton bioimaging [J].

Cao, Li ;

Wang, Xin ;

Meziani, Mohammed J. ;

Lu, Fushen ;

Wang, Haifang ;

Luo, Pengju G. ;

Lin, Yi ;

Harruff, Barbara A. ;

Veca, L. Monica ;

Murray, Davoy ;

Xie, Su-Yuan ;

Sun, Ya-Ping .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (37) :11318-+

[7] Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].

Chan, WCW ;

Nie, SM .

SCIENCE, 1998, 281 (5385) :2016-2018

[8] Luminescent CdS quantum dots as selective ion probes [J].

Chen, YF ;

Rosenzweig, Z .

ANALYTICAL CHEMISTRY, 2002, 74 (19) :5132-5138

[9] Polyamine-functionalized carbon quantum dots for chemical sensing [J].

Dong, Yongqiang ;

Wang, Ruixue ;

Li, Hao ;

Shao, Jingwei ;

Chi, Yuwu ;

Lin, Xiaomei ;

Chen, Guonan .

CARBON, 2012, 50 (08) :2810-2815

[10] Extraction of Electrochemiluminescent Oxidized Carbon Quantum Dots from Activated Carbon [J].

Dong, Yongqiang ;

Zhou, Nana ;

Lin, Xiaomei ;

Lin, Jianpeng ;

Chi, Yuwu ;

Chen, Guonan .

CHEMISTRY OF MATERIALS, 2010, 22 (21) :5895-5899

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