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首页> 外文期刊>Journal of Fluorescence >Perylene Diimide Based Fluorescent Dyes for Selective Sensing of Nitroaromatic Compounds: Selective Sensing in Aqueous Medium Across Wide pH Range
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Perylene Diimide Based Fluorescent Dyes for Selective Sensing of Nitroaromatic Compounds: Selective Sensing in Aqueous Medium Across Wide pH Range

机译：二酰亚胺基荧光染料用于硝基芳香族化合物的选择性传感：在宽pH范围内的水性介质中的选择性传感

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摘要

Water soluble perylenediimide based fluorophore salt, N,N'-bis(ethelenetrimethyl ammoniumiodide)-perylene-3,4,9,10-tetracarboxylicbisimide (PDI-1), has been used for selective fluorescence sensing of picric acid (PA) and 4-nitroaniline (4-NA) in organic as well as aqueous medium across wide pH range (1.0 to 10.0). PDI-1 showed strong fluorescence in dimethylformamide (DMF) (I broken vertical bar f = 0.26 (DMF) and moderate fluorescence in water. Addition of picric acid (PA) and 4-nitroaniline (4-NA) into PDI-1 in DMF/aqueous solution selectively quenches the fluorescence. The concentration dependent studies showed decrease of fluorescence linearly with increase of PA and 4-NA concentration. The interference studies demonstrate high selectivity for PA and 4-NA. Interestingly, PDI-1 showed selective fluorescence sensing of PA and 4-NA across wide pH range (1.0 to 10.0). Selective fluorescence sensing of PA and 4-NA has also been observed with trifluoroacetate (PDI-2), sulfate (PDI-3) salt of PDI-1 as well as octyl chain substituted PDI (PDI-4) without amine functionality. These studies suggest that PA and 4-NA might be having preferential interaction with PDI aromatic core and quenches the fluorescence. Thus PDI based dyes have been used for selective fluorescent sensing of explosive NACs for the first time to the best our knowledge.
机译：水溶性per二酰亚胺基荧光团盐N，N'-双（乙烯三甲基碘化铵）-per-3,4,9,10-四羧酸二酰亚胺（PDI-1）已被用于对苦味酸（PA）和4进行选择性荧光传感硝基苯胺（4-NA）在宽pH范围（1.0至10.0）的有机介质和水性介质中。 PDI-1在二甲基甲酰胺（DMF）中显示出较强的荧光（垂直条f = 0.26（DMF）断开，在水中具有中等荧光。在DMF中的PDI-1中加入苦味酸（PA）和4-硝基苯胺（4-NA） /水溶液选择性淬灭荧光。浓度依赖性研究表明，荧光随PA和4-NA浓度的增加呈线性下降;干扰研究表明对PA和4-NA的选择性高;有趣的是，PDI-1显示对PA和4-NA的选择性荧光传感。 PA和4-NA在很宽的pH范围（1.0至10.0）范围内，还用三氟乙酸（PDI-2），硫酸盐（PDI-3）和PDI-1盐以及PA和4-NA选择性荧光检测辛基链取代的PDI（PDI-4）没有胺官能团。这些研究表明PA和4-NA可能与PDI芳香核有优先相互作用并猝灭荧光，因此基于PDI的染料已用于爆炸性NAC的选择性荧光传感为了 第一次尽我们所能。

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