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

共 41 条

[1] CdSe quantum dots capped PAMAM dendrimer nanocomposites for sensing nitroaromatic compounds
Algarra, M.
Campos, B. B.
Miranda, M. S.
Esteves da Silva, Joaquim C. G.
[J]. TALANTA, 2011, 83 (05) : 1335 - 1340
[2] [Anonymous], 2009, Dendrimer chemistry: concepts, syntheses, properties, applications
[3] Emerging nanopharmaceuticals
Bawarski, Willie E.
Chidlowsky, Elena
Bharali, Dhruba J.
Mousa, Shaker A.
[J]. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE, 2008, 4 (04) : 273 - 282
[4] Fluorescence Lifetime Measurements and Biological Imaging
Berezin, Mikhail Y.
Achilefu, Samuel
[J]. CHEMICAL REVIEWS, 2010, 110 (05) : 2641 - 2684
[5] Fluorescent Properties of a Hybrid Cadmium Sulfide-Dendrimer Nanocomposite and its Quenching with Nitromethane
Campos, Bruno B.
Algarra, Manuel
Esteves da Silva, Joaquim C. G.
[J]. JOURNAL OF FLUORESCENCE, 2010, 20 (01) : 143 - 151
[6] Mercury(II) sensing based on the quenching of fluorescence of CdS-dendrimer nanocomposites
Campos, Bruno B.
Algarra, Manuel
Alonso, Beatriz
Casado, Carmen M.
Esteves da Silva, Joaquim C. G.
[J]. ANALYST, 2009, 134 (12) : 2447 - 2452
[7] Characterization of protein aggregated gold nanocrystals
Connolly, S
Rao, SN
Fitzmaurice, D
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (19) : 4765 - 4776
[8] Dendrimers as drug delivery vehicles: non-covalent interactions of bioactive compounds with dendrimers
Crampton, Hannah L.
Simanek, Eric E.
[J]. POLYMER INTERNATIONAL, 2007, 56 (04) : 489 - 496
[9] da Silva J.G.G. Esteves, 2011, ADV NANOCOMPOSITES S
[10] Fluorescence quenching of anthropogenic fulvic acids by Cu(II), Fe(III) and UO22+
da Silva, JCGE
Machado, AASC
Oliveira, CJS
Pinto, MSSDS
[J]. TALANTA, 1998, 45 (06) : 1155 - 1165

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