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Issue 19, 2017
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Photoinduced electron transfer between quantum dots and pralidoxime: an efficient sensing strategy

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Abstract

Photoinduced electron transfer (PET)-mediated fluorescence quenching of CdTe/CdS quantum dots in the presence of pralidoxime (PAM) was extensively studied using various techniques including fluorescence spectroscopy, UV-Vis spectroscopy and voltammetry. As a result of this study, a highly sensitive fluorescence sensing strategy was developed for quantifying PAM, enabling its concentration to be determined at sub-micromolar levels. Under optimized conditions, this PET-mediated turn-off sensor can be used for determining the concentration of PAM in the concentration range 5.00 × 10−8 M to 4.00 × 10−6 M. The limit of detection (LOD) and limit of quantification (LOQ) here were calculated to be 1.48 × 10−8 M and 4.92 × 10−8 M, respectively. The practical utility of the developed sensor was assessed in artificial urine samples and commercially available PAM injection formulation.

Graphical abstract: Photoinduced electron transfer between quantum dots and pralidoxime: an efficient sensing strategy

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Publication details

The article was received on 09 Mar 2017, accepted on 18 Aug 2017 and first published on 18 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ00795G
Citation: New J. Chem., 2017,41, 10828-10834
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    Photoinduced electron transfer between quantum dots and pralidoxime: an efficient sensing strategy

    A. R. Jose, A. E. Vikraman and K. Girish Kumar, New J. Chem., 2017, 41, 10828
    DOI: 10.1039/C7NJ00795G

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