Electrochemiluminescence of CdTe quantum dots capped with glutathione and thioglycolic acid and its sensing of pb2+

Autor:	Zhian Tan, Xunxun Yin, Lun Wang, Haiyan Wang, Qiongfang Chen
Rok vydání:	2012
Předmět:	Detection limit chemistry.chemical_compound Quenching (fluorescence) chemistry Quantum dot General Chemical Engineering Inorganic chemistry Electrochemistry Electrochemiluminescence Thioglycolic acid Glutathione Cadmium telluride photovoltaics Nuclear chemistry
Zdroj:	Electrochimica Acta. 72:28-31
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2012.03.146
Popis:	Water-soluble and stable CdTe quantum dots (QDs) capped with glutathione (GSH) and thioglycolic acid (TGA) were synthesized (denoted as GSH-TGA-CdTe) and the electrochemiluminescence (ECL) behavior of the QDs was investigated. As a result of specific interaction between the GSH and Pb 2+ , the ECL of the QDs was selectively reduced in the presence of Pb 2+ . Due to the low ECL intensity of QDs capped with GSH alone, TGA as another capping agent was introduced to improve the sensitivity. On the basis of the quenching effect on the ECL of GSH-TGA-CdTe QDs, a sensitive and selective method for the determination of Pb 2+ was developed and a detection limit of 0.26 nM was obtained, which was lower than previous report.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d3d399c8c541569278abef3612b6c8ed https://doi.org/10.1016/j.electacta.2012.03.146 Zobrazit plný text záznamu Full Text from ScienceDirect