Acridine derivative as a “turn on” probe for selective detection of picric acid via PET deterrence

Abstract

A new acridine based photoinduced electron transfer based fluorescent chemosensor for the detection of nitroaromatic compounds is reported. The probe exhibited high selectivity and sensitivity for the detection of picric acid over trivial explosive in CH3OH.

A Facilely Synthesized Dual‐State Emission Platform for Picric Acid Detection and Latent Fingerprint Visualization

“…It is known that two mechanisms mainly contribute to the high sensitivity and selectivity of fluorescence probes in PA detection: One is fluorescence resonance energy transfer (FRET) and the other is photoinduced electron transfer (PET) . Therefore, to further understand the mechanism of PTCA‐C6 in PA detection here, the absorption spectrum of PA in solution and also the cyclovoltammetry (CV) curves of PTCA‐C6 were recorded.…”

“…It is known that two mechanisms mainly contribute to the high sensitivity and selectivity of fluorescencep robesi nPA detection:O ne is fluorescencer esonance energy transfer (FRET) [46] and the other is photoinduced electron transfer (PET). [47] Therefore, to furtheru nderstand the mechanism of PTCA-C6i nP Adetectionh ere, the absorption spectrumo fP A in solution and also the cyclovoltammetry (CV) curves of PTCA-C6 were recorded. The absorption spectrumo fP Ac overst he range 200-450nm( see Figure S18 in the Supporting Information),w hichs hows that there is no optical overlap of the absorptiono fP Aa nd the emission of PTCA-C6i ns olution,t hus indicating that FRET may not be the reason for the high sensitivity and selectivity in PA quenching.…”

Introducing Students to Chemical Security Concepts through Interdisciplinary Experiments Using Organic Chemosensors in Engaging Applications of Chemistry

“…The acridine ring was synthesized by condensation of dimedone, 4nitrobenzaldehyde, and aniline in DMF for 3 h (Scheme 7). 57 The product was then recrystallized and reduced with zinc powder for 6 h. After another recrystallization step, the desired compound (9) was obtained in a good yield. The sensor exhibited very low emission at 443 nm in methanol but the signal dramatically increased in the presence of PA. 1 H NMR spectrum of the mixture of PA and 9 showed disappearance of amino protons and some downfield shifts of aromatic protons.…”

An unexpected dual-response pH probe based on acridine

“…33,34 However, the acridine chromophores were normally studied for acidic pH uorescent probes. 35 In this work, we reported a novel probe 2,8-diethynyl-6H,12H-5,11-methanodibenzo[b,f] [1,5]diazocine (TBN) based on TB and acridine. Surprisingly, compound TBN is capable of measuring pH values at extreme conditions, specically over the two pH ranges: 1.4-3.4 and 12.5-15.0, respectively.…”