ABSTRACT A novel self-assembled monolayer fluorescent film sensor for the determination of vaporized nitroaromatics was prepared using poly(9,9-didecyl-2,7-diethynyl-9H-fluorene-co-alt-dihexadecyloxyphenylene) on a silicon wafer. Poly(9,9-didecyl-2,7-diethynyl-9H-fluorene-co-alt-dihexadecyl-oxyphenylene) was synthesized using Sonogashira coupling between 2,7-bis(ethynyl)-9,9-didecylfluorene, and 1,4-dihexadecyloxy-2,5-diiodobenzene. The polymer was chemically attached to the film on the surface of an azide-functionalized silicon wafer. The emission spectra of the film were stable in the presence of analyte vapor over a range of temperature, allowing practical analysis. The self-assembled monolayer film was sensitive to 2,4-dinitrotoluene, 2,4,6-trinitrotoluene, and picric acid. The self-assembled monolayer film produced 78% and 76% quenching within 30 s in the presence of 2,4-dinitrotoluene and 2,4,6-trinitrotoluene vapor. The quenching efficiency was up to 79% within 120 s for picric acid vapor. The application of the film for the determination of nitroaromatic explosives in soil was evaluated. The limits of detection were 6.9, 9.1, and 20.6 ng g−1 for 2,4-dinitrotoluene, 2,4,6-trinitrotoluene, and picric acid. These results demonstrate novel fluorescence sensing for the determination of vaporized nitroaromatics.

中文翻译：

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自组装单层膜测定土壤中蒸发的硝基芳烃

摘要使用聚（9,9-didecyl-2,7-dithynyl-9H-芴-co-alt-dihexadecyloxyphenylene）在硅片上制备了一种用于测定汽化硝基芳烃的新型自组装单层荧光膜传感器。聚（9,9-二癸基-2,7-二乙炔基-9H-芴-co-alt-二十六烷基-氧亚苯基）使用2,7-双（乙炔基）-9,9-二癸基芴和1之间的Sonogashira偶联合成， 4-二十六烷氧基-2,5-二碘苯。聚合物以化学方式附着在叠氮化物官能化硅晶片表面的薄膜上。在分析物蒸气存在的情况下，薄膜的发射光谱在一定温度范围内是稳定的，允许进行实际分析。自组装单层膜对 2,4-二硝基甲苯、2,4,6-三硝基甲苯和苦味酸敏感。在 2,4-二硝基甲苯和 2,4,6-三硝基甲苯蒸气存在下，自组装单层膜在 30 秒内产生 78% 和 76% 的淬火。苦味酸蒸气在 120 s 内的淬灭效率高达 79%。评价了该薄膜在土壤中硝基芳香炸药测定中的应用。2,4-二硝基甲苯、2,4,6-三硝基甲苯和苦味酸的检测限为 6.9、9.1 和 20.6 ng g-1。这些结果证明了用于测定汽化硝基芳烃的新型荧光传感。6 ng g-1 用于 2,4-二硝基甲苯、2,4,6-三硝基甲苯和苦味酸。这些结果证明了用于测定汽化硝基芳烃的新型荧光传感。6 ng g-1 用于 2,4-二硝基甲苯、2,4,6-三硝基甲苯和苦味酸。这些结果证明了用于测定汽化硝基芳烃的新型荧光传感。