Efficient colorimetric and fluorescent detection of fluoride in DMSO–water mixtures with arylaldoximes

Abstract

Fluoride detection through hydrogen bonding or deprotonation is most commonly achieved using amide, urea or pyrrole derivatives. The sensor molecules are often complex constructs and several synthetic steps are required for their preparation. Here we report the discovery that simple arylaldoximes have remarkable properties as fluoride anion sensors, providing distinct colorimetric or fluorescent readouts, depending on the structure of the arylaldoxime. The oximes showed exceptional selectivity towards fluoride over other typical anions, and low detection limits for fluoride in both DMSO and DMSO-water mixtures were obtained.

A Journey towards Salivary Fluoride Level Detection by Suitable Low Cost Chemosensor: From Molecule to Product

“…In control, we have mixed chemosensor 9 and chemically available fluoride in DMSO-d 6 for 19 F study. In both cases the outcome reveals the unique peak of HF 2 À at À146.5 ppm, [17] validating the colorimetric response.…”

A Coumarin–based Colorimetric and Fluorescent Chemosensor for the “Naked–eye” Detection of Fluoride ion in 100 % Natural Water Medium Using Coated Chromatography Plates

“…Among the available detection methods, colorimetric and fluorescent chemsensors have attracted much more attention owing to their diverse advantages over the other methods, such as high sensitivity, “naked‐eye” detection convenience and no need for expensive equipments . Among various anions, F – is the most electronegative atom, and forms the strongest H‐bond interaction with N–H and O–H group . Over the past few decades, many efforts have been devoted to design various chemosensors for F – sensing involves the polarization of N–H fragments in amides, ureas, thioureas and imidazole based systems through hydrogen bonds .…”

“…[14][15][16][17] Among various anions, Fis the most electronegative atom, and forms the strongest Hbond interaction with N-H and O-H group. [18][19][20][21][22][23] Over the past few decades, many efforts have been devoted to design various chemosensors for Fsensing involves the polarization of N-H fragments in amides, ureas, thioureas and imidazole based systems through hydrogen bonds. [24][25][26][27][28] However, the downside of this type of chemosensor is that other anions, such as AcOand H 2 PO 4 may cause significant interference.…”

A recyclable, fluorescent, and colorimetric sensor for fluoride anion in water using a crosslinked polymer functionalized with hydroxyl quinolinium

“…F − is also used in hypnotics, anesthetics, psychiatric drugs, and cockroach poisons. Numerous monomeric-based colorimetric and/or fluorescent chemosensors for F − have focused on systems containing imidazole, 7−10 urea, 11,12 thiourea, 13 naphthalimide, 14−17 coumarin, 18 spiropyran, 19 triarylborane, 20 phenanthroline, 21 quinoline, 22,23 arylaldoxime, 24 Rhodamine-Furan, 25 Si-O, 26 indole, 27 metal-organic frameworks, 28 diketopyrrolopyrrole, 29 or calix [4]pyrrole 30,31 moieties. Therefore, determination of F − is significant.…”