含苯甲酸乙酯结构的共轭材料对硝基芳烃爆炸物的荧光检测

Conjugated Materials Containing Ethyl Benzoate Structure for Fluorescent Detection of Nitroaromatic Explosives

以苯甲酸乙酯为骨架,在不同位置引入不同数量的三苯乙烯和四苯乙烯,制备了含苯甲酸乙酯结构的系列共轭化合物EB1~EB4。紫外-可见吸收光谱和荧光发射光谱测试结果表明,所合成的四种共轭材料均具有明显的聚集诱导发光特性。将四种共轭材料作为荧光探针,成功用于硝基爆炸物的水相识别。荧光滴定结果表明,该系列共轭化合物对苦味酸(PA)具有潜在的传感性能,化合物EB1~EB4对溶液中PA的检测限分别为1.35×10^(-6),1.69×10^(-6),1.12×10^(-6),8.88×10^(-7)mol/L;做成试纸检测器的裸眼检测限为1.14 ng/cm^(2)。这类含苯甲酸乙酯结构的共轭材料及其衍生物为新型荧光材料的制造提供了重要思路。

A series of conjugated compounds EB1-EB4 have been synthesized with different positions and numbers of triphenylethylene/tetraphenylethylene groups and the same ethyl benzoate(EB)skeleton via the Suzuki coupling reaction.The UV-Vis absorption and fluorescent emission experiment show that all four compounds exhibit obvious aggregation-induced emission(AIE)properties.More importantly,these materials can identify and recognize nitro explosives for the aqueous phase as fluorescent probes.The fluorescent titration results indicate compounds EB1-EB4 possess the potential sensing properties for picric acid(PA),with a low detection limit of 1.35×10^(-6),1.69×10^(-6),1.12×10^(-6),8.88×10^(-7) mol/L,respectively.Interestingly,the best result of the test paper detector is 1.14 ng/cm^(2) for PA.These conjugated compounds and their derivatives containing EB structure provide important ideas for the manufacture of future fluorescent materials.