title: Colorimetric and fluorimetric response of Schiff base molecules towards fluoride anion, solution test kit fabrication, logical interpretations and DFT-D3 study.
abstract: Two newly synthesized Schiff base molecules are herein reported as anion sensors. -NO2 substituted receptor (P1) is comparatively more acidic and can sense F(-), OAc(-) and H2PO4(-), whereas -CN substituted receptor (P2) is less acidic and is selective for F(-) only. Reversible UV-Vis response for both receptors with F(-) can mimic multiple logic gate functions, and several complex electronic circuits based on XNOR, XOR, OR, AND, NOT and NOR logic operations with 'Write-Read-Erase-Read' options have been executed. Interesting 'turn on and off' fluorescence responses were noticed for the receptors with F(-). Intracellular F(-) detection as a diagnosis of non-skeletal fluorosis was successful using a fluorescence microscope with Candida albicans (prokaryotic cell, a diploid fungus) and pollen grains of Tecoma stans (eukaryotic cell) incubated in 10(-6) M fluoride-contaminated hand-pump water collected from Bankura, West Bengal, India. Furthermore, a solution test kit was fabricated for easy and selective detection of F(-) in an aqueous solvent.
authors.affiliation: Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur-713209, Burdwan, West Bengal, India. pr_banerjee@cmeri.res.in priyabrata_banerjee@yahoo.co.in.
authors.forename: Pritam
authors.initials: P
authors.lastname: Ghosh
authors.forename: Biswajit Gopal
authors.initials: BG
authors.lastname: Roy
authors.forename: Saibal
authors.initials: S
authors.lastname: Jana
authors.forename: Subhra Kanti
authors.initials: SK
authors.lastname: Mukhopadhyay
authors.forename: Priyabrata
authors.initials: P
authors.lastname: Banerjee
mesh_terms: D003124:Colorimetry; D055615:Electrical Equipment and Supplies; D005459:Fluorides / Q000032:analysis* / Q000737:chemistry*; D005470:Fluorometry; D006834:Hydrazines / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D011789:Quantum Theory; D012545:Schiff Bases / Q000737:chemistry; D012996:Solutions
chemical_list: D006834:Hydrazines; D012545:Schiff Bases; D012996:Solutions; D005459:Fluorides