Turn‐off Fluorescent Sensing of Energetic Materials using Protonic Acid doped Polyaniline: A Spectrochemical Mechanistic Approach,Zeitschrift für anorganische und allgemeine Chemie

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Turn‐off Fluorescent Sensing of Energetic Materials using Protonic Acid doped Polyaniline: A Spectrochemical Mechanistic Approach
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-10-13 , DOI: 10.1002/zaac.202000321
Veerabhadragouda B. Patil _{1,

2} , Satish A. Ture _{1,

3} , Channabasaveshwar V. Yelamaggad ₄ , Mallikarjuna N. Nadagouda ₅ , Abbaraju Venkataraman _{1,

3}

Affiliation

The trace detection of energetic materials (EMs) is a challenge due to the very low vapor pressure possessed by these compounds. Polyaniline (PAni) possesses variable oxidation and reduction states, which makes it strike different from other conducting polymers in understanding the mechanism of fluorophore‐analyte interaction leads to the designing of selectivity and sensitivity of analytes; also, fluorophore as a sensing device. The present work is aimed at trace detection of some very prominent EMs; nitroarenes viz., 1,3,5‐trinitroperhydro‐1,3,5‐triazine (RDX), trinitrotoluene (TNT); nitramines viz., hexanitrohexaazaisowurtzitane (CL‐20) and nitro ester viz., pentaerithroltetraniterate (PETN) employing para‐toluenesulfonic acid as a dopant for PAni nanofibers (P‐PAni). The P‐PAni helps overcome the dual difficulties of PAni, i.e., solubility and removal of π stacking when dimethylformamide (DMF) is used as a solvent. P‐PAni showed good quenching response and selectivity towards EMs, with the LOD being the best for CL‐20 (0.717 μM·L^–1). The sensing studies further collaborated with the Cyclic Voltammetry, FTIR and Raman Spectroscopy studies gave a detailed understanding of the bipolaron‐polaron transition mechanism accompanying the electron transfer process in the fluorescence quenching study.

中文翻译：

使用质子酸掺杂的聚苯胺关闭高能材料的荧光传感：一种光谱化学机制方法

由于这些化合物具有极低的蒸气压，因此高能材料（EMs）的痕量检测是一项挑战。聚苯胺（PAni）具有可变的氧化和还原态，这使其在理解荧光团与分析物相互作用的机理导致设计分析物的选择性和灵敏度方面与其他导电聚合物大相径庭。同样，荧光团作为传感装置。目前的工作旨在对一些非常著名的新兴市场进行痕量检测。硝基芳烃，即1,3,5-三硝基过氢-1,3,5-三嗪（RDX），三硝基甲苯（TNT）; 硝胺，六硝基六氮杂异纤锌矿型结构烷烃（CL-20）和硝酸酯，戊四醇四硝酸酯（PETN）采用对位甲苯磺酸作为PAni纳米纤维（P-PAni）的掺杂剂。P-PAni有助于克服PAni的双重困难，即当使用二甲基甲酰胺（DMF）作为溶剂时，溶解度和π堆积的去除。P‐PAni表现出良好的猝灭响应和对EM的选择性，LOD最适合CL‐20（0.717μM · L ^–1）。传感研究进一步与循环伏安法，FTIR和拉曼光谱研究合作，在荧光猝灭研究中对伴随电子转移过程的双极化子-极化子跃迁机制进行了详细的了解。

更新日期：2020-10-13

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