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. Issue 38 (13th October 2020)

• Record Type: Journal Article
• Authors: Mondal, Amita; Hazra, Abhijit; Chakrabarty, Jitamanyu; Murmu, Naresh C.; Banerjee, Priyabrata
• Is Part Of: ChemistrySelect. Volume 5:Issue 38(2020)
• Page Start: 11976
• Page End: 11985
• Publication Date: 2020-10-13
• Subjects: cyanide and fluoride -- logic gate -- mercury -- sensors -- theoretical corroboration; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202002964
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: An inimitable Schiff‐base chemosensor PMA (9‐anthracenecarboxaldehyde pentafluorophenylhydrazone) was premeditated and implicated with the aim of detecting F − and CN − in semi‐aqueous medium. Highly photostable, multichannel sensory probe, PMA (with 31 % quantum yield) exhibited amusing sensing efficiency towards F − and CN − by dint of colorimetric, fluorimetric as well as electrochemical alterations, with a very low detection limit (76 nM for F − and 92 nM CN − ). However, all the experimental outcomes evidenced PMA to be more sensitive towards F − than CN − owing to the more electronegativity and smaller size of F − . 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 − /CN − and Hg 2+ also helped to intend a three input logical circuitry. Abstract : In the pursuit of detecting F − and CN − selectively by a single multichannel chemosensor, PMA (9‐anthracenecarboxaldehyde pentafluorophenylhydrazone) has been synthesized, which can detect F − (detection limit of 76 nm) more promisingly in compared to CN − (detection limit of 92 nm) owing to the smaller size and more electronegativity of F − . Moreover, all the theoretical outcomes along with potential energy surface scanning well corroborated with the experimental findings affirming stronger affinity of PMA towards F − .