聚对苯撑乙炔咔唑薄膜对TNT挥发物的检测

Fluorescence Detecting of Carbazole-containing Poly(phenyleneethynylene)'s Thin Film to TNT Volatile

以3,6-二溴-9-辛基咔唑和2,5-二戊烷氧基-1,4-二乙炔基苯为单体,通过Pd催化的Sonogashira偶联反应合成了聚对苯撑乙炔咔唑衍生物PPECz。PPECz的溶液和固体薄膜都具有较好的发光性能,并且均对2,4,6-三硝基甲苯(TNT)有明显的响应。在常温常压条件下,微量(40μg)的TNT挥发物在60 s内就能使聚合物PPECz薄膜的荧光强度被猝灭56%,可作为一种潜在的硝基苯类爆炸物的荧光检测材料。

Poly（phenylene ethynylene） containing carbazole unit in the main-chain（PPECz） was synthesized by Pd-catalyzed Sonogashira coupling reaction between 3,6-dibromo-9-octylcarbazole and 2,5-dimethoxy-1,4-diethynylbenzene.PPECz in the solution and thin film exhibits obvious luminescence properties,which can be used to detect TNT sensitively.The fluorescence intensity of PPECz thin-film can be quenched 56% by the volatile of 40 μg TNT solid at 60 s at normal atmospheric temperature and pressure.This strategy can provide a platform for developing highly sensitive and efficient chemo sensors for warfare explosives.