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Saha D, Negi DPS. Spectroscopic investigations on the interaction of thioacetamide with ZnO quantum dots and application for its fluorescence sensing. Spectrochim Acta A Mol Biomol Spectrosc. 2017;189:516-521doi: 10.1016/j.saa.2017.08.053.
Saha, D., & Negi, D. P. S. (2018). Spectroscopic investigations on the interaction of thioacetamide with ZnO quantum dots and application for its fluorescence sensing. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 189516-521. https://doi.org/10.1016/j.saa.2017.08.053
Saha, Dipika, and Negi, Devendra P S. "Spectroscopic investigations on the interaction of thioacetamide with ZnO quantum dots and application for its fluorescence sensing." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 189 (2018): 516-521. doi: https://doi.org/10.1016/j.saa.2017.08.053
Saha D, Negi DPS. Spectroscopic investigations on the interaction of thioacetamide with ZnO quantum dots and application for its fluorescence sensing. Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jan 15;189:516-521. doi: 10.1016/j.saa.2017.08.053. Epub 2017 Aug 18. PMID: 28866408.
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Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jan 15;189:516-521. doi: 10.1016/j.saa.2017.08.053. Epub 2017 Aug 18.

Spectroscopic investigations on the interaction of thioacetamide with ZnO quantum dots and application for its fluorescence sensing.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Dipika Saha, Devendra P S Negi

Affiliations

  1. Centre for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong 793022, India.
  2. Centre for Advanced Studies in Chemistry, North-Eastern Hill University, Shillong 793022, India. Electronic address: [email protected].

PMID: 28866408 DOI: 10.1016/j.saa.2017.08.053

Abstract

The purpose of the present work was to develop a method for the sensing of thioacetamide by using spectroscopic techniques. Thioacetamide is a carcinogen and it is important to detect its presence in food-stuffs. Semiconductor quantum dots are frequently employed as sensing probes since their absorption and fluorescence properties are highly sensitive to the interaction with substrates present in the solution. In the present work, the interaction between thioacetamide and ZnO quantum dots has been investigated by using UV-visible, fluorescence and infrared spectroscopy. Besides, dynamic light scattering (DLS) has also been utilized for the interaction studies. UV-visible absorption studies indicated the bonding of the lone pair of sulphur atom of thioacetamide with the surface of the semiconductor. The fluorescence band of the ZnO quantum dots was found to be quenched in the presence of micromolar concentrations of thioacetamide. The quenching was found to follow the Stern-Volmer relationship. The Stern-Volmer constant was evaluated to be 1.20×10

Copyright © 2017 Elsevier B.V. All rights reserved.

Keywords: Fluorescence; Quenching; Semiconductor; Thioacetamide; Zinc oxide quantum dots

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