N-Alkyl derivative of 1,9-pyrazoloanthrone as a sensor for picric acid

Abstract

TheN-alkyl derivative of 1,9-pyrazoloanthrone has been synthesized, characterized and evaluated as a potent sensor for picric acid.

PET governed fluorescence “Turn ON” BODIPY probe for selective detection of picric acid

“…In the eld of NAC detection, the applied metal organic frameworks or quantum dots mostly contain cadmium and the pyrene class of sensors are limited by their toxicity. 18,21,25,26 Among the available sensors for picric acid, detection by quenching of the uorescence 18,[27][28][29][30][31] is more explored than 'no quenching uorescence sensors'. [32][33][34][35][36] Currently p-terphenyl benzimidazolium-based molecular baskets, 37 zinc-phthalocyanine framework based chemosensors with uorescence quenching, 38,39 electron-rich triphenylaminebased sensors with charge-transfer complex formation, 40 electrogenerated thin lms of a microporous polymer network responding to NACs, 41 a glucopyranosyl-1,4-dihydropyridine chemosensor, 42 a metal-organic framework [Cd 3 (TPT) 2 -(DMF) 2 ]$(H 2 O) 0.5 for NAC detection, 43 and a self-assembled nanoscopic organic cage for PA detection 44 are some strategies focusing on NAC explosives detection.…”

Hydrogen bond directed high-fidelity optical detection of picric acid: A single driver on diverse roads towards the same destiny

“…Thereafter, Prasad and Row reported an N -alkyl pyrazoloanthrone derivative ( 73 , Fig. 13) 107 that successfully recognized PA at the ppm level (LOD = 1 ppm) in DCM through sharp quenching (96%) of the emission band at 465 nm. PA protonated the probe and formed a non-emissive probe-PA excimer, blocking the ICT from nitrogen to the phenanthrone moiety.…”

Selective Detection of 2,4,6‐Trinitrophenol Based on In Situ‐generated Fluorescent Zn2+–Anthracene Ensembles in 80% Aqueous Dimethyl Sulfoxide

“…Such rational designs promote highly selective target analyte interactions with the probe's interaction sites (even in the presence of its isomeric mixture) through specific columbic, hydrogen bonding, covalent bonding, electron‐deficient/rich π–π interactions, or molecular encapsulation, either separately or in a synergistic way . Large supramolecules and cavitand preparations usually encounter tedious problems related to the ease of synthesis, time, solvent tunability, solubility in aqueous media, functional group interconversions, atom economy, and complex analysis . Generally, solution‐based sensing in the aqueous phase ( in situ ‐generated ensemble type) is considered more eco‐friendly and simpler to prepare because of its reduced sample requirement (ppb level), ability to attain higher temporal resolutions, and single‐molecule sensing ability.…”

“…[5][6][7] Large supramolecules and cavitand preparations usually encounter tedious problems related to the ease of synthesis, time, solvent tunability, solubility in aqueous media, functional group interconversions, atom economy, and complex analysis. [8][9][10] Generally, solution-based sensing in the aqueous phase (in situ-generated ensemble type) is considered more eco-friendly and simpler to prepare because of its reduced sample requirement (ppb level), ability to attain higher temporal resolutions, and singlemolecule sensing ability. Most of the fluorescent probes designed for 2,4,6-trinitrophenol (TNP) experience interference-related problems with di-and mononitrophenols and electron-deficient nitroaromatics in organic or mixed aqueous media because of the labile binding sites (functional groups), and their connections (spacers) to fluorophore units [11][12][13][14] by a typically wellorganized "extrinsic approach."…”