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Branched Ligand Ethyl 2‐Mercaptopropionate as a Stabilizer for CdTe Quantum Dots and its use as a Cu 2+ Ions Probe in Aqueous Medium
Author(s) -
Choudhary Yogesh S.,
Gomathi N.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903767
Subject(s) - quantum dot , ligand (biochemistry) , ion , photoluminescence , cadmium telluride photovoltaics , aqueous solution , detection limit , quenching (fluorescence) , luminescence , materials science , linear range , photochemistry , chemistry , fluorescence , analytical chemistry (journal) , nanotechnology , optoelectronics , physics , optics , organic chemistry , chromatography , biochemistry , receptor
In the present work, we explored the possibility of using a novel stabilizing ligand namely ethyl 2‐mercaptopropionate for the synthesis of CdTe quantum dots (QDs). The QDs were synthesized and stabilized by the ligand and it was realized to be emitting at 560 nm. Extensive microscopic and photo physical characterization were carried out in order to unearth the nature of the QDs synthesized. Interestingly, it was observed that, the photoluminescence emission of as synthesized QDs were getting quenched linearly in the presence of Cu 2+ , which prompt us to make use of these QDs for the detection of Cu 2+ ions in aqueous media. A detailed mechanism of quenching was also proposed. The linear range over which the QDs was selective to Cu 2+ ions was from 0.5 nM to 129.5 nM with a detection limit (LOD) of 0.5 nM providing a pathway for the QDs based Cu 2+ probe.