A Harmonized Applied and Theoretical Exploration for Nanomolar Level Recognition of Perilous F⁻ and CN⁻ by Multichannel Chemosensor: Proposition of Hg²⁺‐Mediated Logic Gate Imitator

Abstract

An inimitable Schiff-base chemosensor PMA (9-anthracenecarboxaldehyde pentafluorophenylhydrazone) was premeditated and implicated with the aim of detecting F À and CN À in semiaqueous medium. Highly photostable, multichannel sensory probe, PMA (with 31 % quantum yield) exhibited amusing sensing efficiency towards F À and CN À by dint of colorimetric, fluorimetric as well as electrochemical alterations, with a very low detection limit (76 nM for F À and 92 nM CN À). However, all the experimental outcomes evidenced PMA to be more sensitive towards F À than CN À owing to the more electro-negativity and smaller size of F À. The spectroscopic characterizations of the chemosensor along with the sensing studies were performed by more than a few erudite analytical tools, whereas the theoretical calculations also substantiated the experimental consequences. Here the thorough investigation on the theoretical aspect was performed to ensure the effective and plausible reason behind different sensitivity towards these two perilous anions. Moreover, the recyclability of PMA upon simultaneous addition of F À /CN À and Hg 2 + also helped to intend a three input logical circuitry.

Strategic Design of Anthracene-Decorated Highly Luminescent Coordination Polymers for Selective and Rapid Detection of TNP: An Explosive Nitro Derivative and Mutagenic Pollutant

“…The near nonlinear characteristics of the S−V plots also signify that quenching phenomena can be attributed to the combined static and dynamic ones. 66,67 Furthermore, the time-resolved fluorescence quenching experiments were performed to monitor the fluorescence decays of 1 and 2 without and with TNP (Figures S11 and S12, Supporting Information) to establish the quenching phenomena and more insight into the mechanism. 68,69 The lifetime of the excited state of 2 (6.43 ns) is much higher than that of 1 (1.03 ns) which indicates that the excited state of 2 is more stable and provides sufficient time for interaction with the analyte as compared to 1.…”

“…In this connection, the S–V plot of 2 shows nonlinear characteristics (Figure S9, Supporting Information), which also supports the feasibility of RET between the anthracene subunit of 2 and TNP. The near nonlinear characteristics of the S–V plots also signify that quenching phenomena can be attributed to the combined static and dynamic ones. , …”

Explicating the recognition phenomenon of hazardous nitro-aromatic compound from contaminated environmental and cellular matrices by rationally designed pyridine-functionalized molecular probes

“…In the FT-IR spectra, the occurrence of the peak at 1640 cm −1 (for DMP) and 1600 cm −1 (for MP) affirmed the presence of the –C=N- group within the chemosensors, while in the case of MP, the broad peak at 3200 cm −1 suggested the existence of –OH group [ 36 ]. After the addition of TNP, a new peak emerged at 3120 cm −1 corresponding to the phenolic –OH moiety, suggesting the formation of the sensor-analyte adducts ( Fig.…”