Thiolated DAB dendrimers and CdSe quantum dots nanocomposites for Cd(II) or Pb(II) sensing

被引：43

作者：

Algarra, M. ^{[2
]}

Campos, B. B. ^{[1
]}

Alonso, B. ^{[3
]}

Miranda, M. S. ^{[2
]}

Martinez, A. M. ^{[3
]}

Casado, C. M. ^{[3
]}

Esteves da Silva, J. C. G. ^{[1
]}

机构：

[1] Univ Porto, Ctr Invest Quim, Dept Quim & Bioquim, Fac Ciencias, P-4169007 Oporto, Portugal

[2] Univ Porto, Ctr Geol, Dept Geociencias Ambiente & Ordenamento Terr Port, Fac Ciencias, P-4169007 Oporto, Portugal

[3] Univ Autonoma Madrid, Dept Quim Inorgan, E-28049 Madrid, Spain

来源：

TALANTA | 2012年 / 88卷

关键词：

DAB dendrimer; Nanocomposite sensor; CdSe quantum dots; Thiolated DAB dendrimer; Cd(II); Pb(II); SYNCHRONOUS FLUORESCENCE-SPECTRA; FULVIC-ACIDS; SEMICONDUCTOR NANOCRYSTALS; GOLD NANOPARTICLES; BIOSENSOR; AL(III);

D O I：

10.1016/j.talanta.2011.11.007

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Four different generation of thiol-DAB dendrimers were synthesized, S-DAB-G(x) (x = 1, 2, 3 and 5), and coupled with CdSe quantum dots, to obtain fluorescent nanocomposites as metal ions sensing. Cd(II) and Pb(II) showed the higher enhancement and quenching effects respectively towards the fluorescence of S-DAB-G(5)-CdSe nanocomposite. The fluorescence enhancement provoked by Cd(II) can be linearized using a Henderson-Hasselbalch type equation and the quenching provoked by Pb(II) can be linearized by a Stern-Volmer equation. The sensor responds to Cd(II) ion in the 0.05-0.7 mu M concentration range and to Pb(II) ion in the 0.01-0.15 mM concentration range with a LOD of 0.06 mM. The sensor has selectivity limitations but its dendrimer configuration has analytical advantages. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：403 / 407

页数：5

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