Fluoranthene Based Functional Materials as a Potential Chemical Sensors for Explosive Nitroaromatics and Multi Metal Ions

Abstract

Explosive material detection is one of the most critical issues in the interest of newlinenational security and is strongly recommended for forensic investigation, minefield newlinerestoration and environmental remediation. Trinitrotoluene (TNT) and Trinitrophenol newline(TNP)/Picric Acid (PA) are two explosive nitroaromatic compounds (NACs) that have newlinedrawn most of the attention because of the danger that their toxic breakdown products newlinepose to the soil and groundwater. Therefore, there is an urgent need to design and newlinedevelop highly selective, sensitive, affordable, and portable detection technologies to newlineidentify and address the adverse effects of NACs on the environment and people. newlineTowards the design and development of new fluorescence-based chemical sensors is an newlineactive and intriguing field in the realm of analyte recognition. To achieve susceptible newlinedetection of analytes, the fluorophore should possess a high and#960;-electron rich environment newlinewith extended conjugation to offer efficient and#960; and#960; interactions. In this aspect, we have newlinedeveloped phenyl/thiophene (M1/T1) substituents flanked to fluoranthene by Diels- newlineAlder reaction methods. Both materials demonstrated high sensitivity and selectivity newlinetowards the detection of TNP in the dispersed phase. Notably, T1 showed a high newlinequenching rate constant at fw = 90 % (KSV = 5.81 × 104 M-1) with LOD of 0.6 ppm at newlinefw = 70 %. Further, we have introduced a novel fluoranthene derivative by substituting newlinedifferent alkyl units (P1-P3) at periphery newline