title: Fluorescence quenching of CdSe quantum dots by nitroaromatic explosives and their relative compounds.
abstract: 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.
authors.affiliation: School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
authors.forename: Guo Hua
authors.initials: GH
authors.lastname: Shi
authors.forename: Zhuo Bin
authors.initials: ZB
authors.lastname: Shang
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Wei Jun
authors.initials: WJ
authors.lastname: Jin
authors.forename: Tian Cai
authors.initials: TC
authors.lastname: Zhang
mesh_terms: D000042:Absorption; D019187:Cadmium Compounds / Q000737:chemistry*; D053834:Explosive Agents / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013997:Time Factors
chemical_list: D019187:Cadmium Compounds; D053834:Explosive Agents; D018036:Selenium Compounds; C058667:cadmium selenide