Shi Guo Hua, Shang Zhuo Bin, Wang Yu, Jin Wei Jun, Zhang Tian Cai
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2008 Jul;70(2):247-52. doi: 10.1016/j.saa.2007.07.054. Epub 2007 Aug 8.
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.
在油酸和十八烯介质中高温合成了CdSe量子点（QDs），并将其分散于氯仿中。硝基芳香族炸药及其相关化合物，如2,4,6-三硝基甲苯（TNT）、2,4-二硝基甲苯（DNT）、硝基苯（NB）、2,4-二硝基氯苯（DNBCl）和对硝基甲苯（NT），均可明显导致所合成量子点的荧光猝灭。在最佳条件下，对它们在10^(-8)至10^(-5) M浓度范围内均观察到非线性响应。ln I(0)/I对C的修正Stern-Volmer猝灭方程在10^(-5) M数量级内呈现良好的线性关系，检测限接近10^(-6)至10^(-7) M。
