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Fluorescence quenching of CdSe quantum dots by nitroaromatic explosives and their relative compounds



Fluorescence quenching of CdSe quantum dots by nitroaromatic explosives and their relative compounds



Spectrochimica Acta. Part A Molecular and Biomolecular Spectroscopy 70(2): 247-252



CdSe quantum dots (QDs) were synthesized in oleic acid and octadecene medium under high-temperature and dispersed in chloroform. Nitroaromatic explosives and their relative compounds, 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), nitrobenzene (NB), 2,4-dinitrochlorobenzene (DNBCl) and p-nitrotoluene (NT) can obviously cause the fluorescence quenching of the synthesized QDs. Under the optimum conditions, a nonlinear response was observed over the concentration range of 10(-8) to 10(-5) M for them all. The modified Stern-Volmer quenching equations of ln I(0)/I versus C show a good linear relation in 10(-5) M order of magnitude, and the detection limits approach 10(-6) to 10(-7) M.

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Accession: 053266731

Download citation: RISBibTeXText

PMID: 17870656

DOI: 10.1016/j.saa.2007.07.054


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