A hydrazide organogelator for fluoride sensing with hyperchromicity and gel-to-sol transition

Abstract

A low-molecular-weight organogelator containing hydrazide groups, DPH, exhibited considerable selectivity and sensitivity for fluoride. The optical sensing of fluoride was demonstrated with the systematic study on the sensing mechanism.

On‐Site Detection for Hazardous Materials in Chemical Accidents

“…Interestingly, a novel fiber‐optic probe‐coated SiO 2 sol–gel has been developed for quantifying the concentration the HF acid in aqueous solutions relying on reflection‐based localized surface plasmon resonance (Figure 1(b)). 49 Furthermore, the design of functionalized receptors serving fluoride ions sensor, as well as fluoride‐selective chemo‐sensors, such as naproxen‐derived Schiff‐base, 50 hydrazide organogelator, 51 hydrazone, 52 and acyl hydrazone 53 have gained great interest. Importantly, various recent researches have not only focused on sol–gel‐based probes and receptors but also on nanomaterials such as Fe(III)‐oxidized graphitic carbon nitride nanosheets for fluoride ion detection 54 …”

A stimuli-responsive l-DOPA-based supramolecular gel for the detection of fluoride ion

“…48 In this context, detection of F − ions by means of a visible gel-to-solution (sol) transition process is a newly developed application for LMWGs. Most of the works related to F − ion sensing by sol–gel transition incorporate urea, 49 oxalamide, 50 acylhydrazone, 51 hydrazide, 52 and imine moieties 53 where the competitive hydrogen bonding interaction between the –NH– moiety and F − ion disrupted the existing non-covalent supramolecular interactions, which results in a gel-to-sol phase transition. Alongside, very few reports are available in the literature where F − ions cleave covalent bonds to convert the gelator into a non-gelator with a concomitant gel-to-sol phase transition.…”

Aggregation‐Induced Emission, Mechanofluorochromism, and Selective Fluoride Detection by a Tripodal Salicylaldimine

“…A multitude of sensors are known for the detection of fluoride anions. [17][18][19][20][21][22][23] The ideal candidate for fluoride detection should be cost effective, easy to prepare and should allow fluoride detection under a variety of conditions. In this context, Schiff's bases are easy to synthesize and are known for their binding affinity towards cations.…”

“…A multitude of sensors are known for the detection of fluoride anions [17–23] . The ideal candidate for fluoride detection should be cost effective, easy to prepare and should allow fluoride detection under a variety of conditions.…”