Fluorescence quenching of CdSe quantum dots by nitroaromatic explosives and their relative compounds.
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.
Shi
Guo Hua
GH
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
Shang
Zhuo Bin
ZB
Wang
Yu
Y
Jin
Wei Jun
WJ
Zhang
Tian Cai
TC
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
D019187:Cadmium Compounds; D053834:Explosive Agents; D018036:Selenium Compounds; C058667:cadmium selenide