Issue 4, 2013
From the journal:

Green Chemistry

Electrochemical synthetic route for preparation of CdTe quantum-dots stabilized by positively or negatively charged ligands

Rogério T. Ribeiro,a   Jéssica M. M. Dias,b   Giovannia A. Pereira,b   Denilson V. Freitas,b   Mariana Monteiro,b   Paulo E. Cabral Filho,a   Renata A. Raele,c   Adriana Fontes,a   Marcelo Navarro*b  and  Beate S. Santosd  

* Corresponding authors

a Departamento de Biofísica e Radiologia – CCB, Universidade Federal de Pernambuco, Recife – PE, Brazil

b Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife – PE, Brazil
E-mail: navarro@ufpe.br
Fax: +55 81 2126 8442
Tel: +55 81 2126 7460

c Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife – PE, Brazil

d Departamento de Ciências Farmacêuticas – CCS, Universidade Federal de Pernambuco, Recife – PE, Brazil

Abstract

An electrochemical route for the generation of Te2− ions in an aqueous solution, with high yield and great stability, was developed and applied for the preparation of CdTe quantum dots (QDs) stabilized by negatively or positively charged ligands. An aqueous Cd(ClO4)2 solution containing mercaptopropionic acid (MPA) or cysteamine (Cys) stabilizers was directly added to the electrochemically generated aqueous telluride ion solution. This one pot process is quite reproducible and clean (no chemical reducing agents), allowing control of reduced species generation. The CdTe QDs showed good stability and high luminescence with particle average sizes of d = 3.1 nm (MPA) or 2.7 nm (Cys). Macrophages were efficiently labeled with MPA-capped CdTe QDs as well as with Cys-capped CdTe QDs.

Graphical abstract: Electrochemical synthetic route for preparation of CdTe quantum-dots stabilized by positively or negatively charged ligands

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Article information

DOI
https://doi.org/10.1039/C3GC36990K
Article type
Paper
Submitted
08 Dec 2012
Accepted
07 Feb 2013
First published
07 Feb 2013

Green Chem., 2013,15, 1061-1066

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Electrochemical synthetic route for preparation of CdTe quantum-dots stabilized by positively or negatively charged ligands

R. T. Ribeiro, J. M. M. Dias, G. A. Pereira, D. V. Freitas, M. Monteiro, P. E. Cabral Filho, R. A. Raele, A. Fontes, M. Navarro and B. S. Santos, Green Chem., 2013, 15, 1061 DOI: 10.1039/C3GC36990K

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