力致变色吩噻嗪衍生物的合成及其对2，4，6-三硝基苯酚的荧光检测

设计合成了2种具有明显聚集诱导发光(AIE)特性的吩噻嗪衍生物(SPA和SPN).荧光光谱研究表明, 这2种化合物在水溶液中能够特异性地识别2, 4, 6-三硝基苯酚(TNP), 其中SPA荧光检测TNP的猝灭率为89.1%, 猝灭常数K_sv为3.18×104 L/mol, 检出限为8.62×10-7 mol/L; SPN荧光检测TNP的猝灭率为90.4%, 猝灭常数K_sv为4.43×104 L/mol, 检出限为5.00×10-7 mol/L, 有望作为荧光探针特异性识别TNP.而且SPA分子具有可逆的力致荧光变色特性, 在紫外灯下发出蓝色荧光, 研磨后变为浅黄色, 有望被用于防伪材料或者可视化压力传感器领域.

The Synthesis of Phenothiazine Derivatives with Mechanofluorochromism Property and the Fluorescence Detection for 2, 4, 6-trinitrophenol

Two phenothiazine derivatives (SPA and SPN) with significant aggregation-induced emission (AIE) characteristics were designed and synthesized. Photoluminescence spectroscopy showed that these two compounds could specifically recognize TNP in aqueous media. The ?uorescence of SPA was quenched by 89.1% in the presence of TNP with a detection limit as low as 8.62×10-7 mol/L and a high Stern-Volmer quenching constant (K_sv) of 3.18×104 L/mol. The fluorescence of SPN was quenched by 90.4% after addition of TNP with a detection limit as low as 5.00×10-7 mol/L and a high Stern-Volmer quenching constant of 4.43×104 L/mol. It indicated that SPA and SPN were expected to work as ?uorescent probe to detection TNP with high sensitivity and selectivity. Moreover, SPA showed reversible mechanofluorochromic properties. It was observed that SPA emitted strong blue fluorescence under 365 nm UV light and the color changed light yellow after grinding. So it can promisingly be applied to the fields of visual pressure sensors or anti-counterfeiting materials.