A colorimetric and fluorescent sensor for the detection of both fluoride ions and trifluoroacetic acid based on acylhydrazone derivatives

Abstract

An acylhydrazone-based colorimetric and fluorescent sensor (PAH-8) for the detection of F− and TFA/TEA has been studied. PAH-8 solution and organogel are highly selective and sensitive to F− among various tested anions in DMSO.

A simple colorimetric and ratiometric fluoride ion probe with large color change

“…The result was similar with those of uoride ion probes based on acylhydrazone skeleton reported previously. [40][41][42][43][44][45] To gain further insight into the observed difference of red shi value of the absorption band between SHJ-1 and SHJ-2 during the uoride ion sensing, the optimized geometries for probes and probes with F À were optimized by DFT calculation using Gaussian 16, respectively. As shown in Fig.…”

“…The result was similar with those of fluoride ion probes based on acylhydrazone skeleton reported previously. 40–45 …”

“…38 For naked-eye detection, it is signicant to design chemical probes with large color change toward uoride ion sensing. 39 Recently, uoride ion probes based on acylhydrazone derivates have been successfully developed for naked-eyes detection, 40,41 mainly originated from the strong binding between active proton in acylhydrazone moiety and F À , which further induced the deprotonation of the probe and facilitate the p-p* transition in low energy, 42 resulting in a red shi of absorption spectra. 43 The reported uoride ion probes based on acylhydrazone derivates were normally constructed by introducing a non-conjugated acylhydrazone unit among two conjugated moieties.…”

Multistimuli-Responsive Fluorescent Organogelator Based on Triphenylamine-Substituted Acylhydrazone Derivative

“…33,34 Second, an acylhydrazone group was introduced into the molecule because studies have shown that acylhydrazone group can be protonated and used to detect acid or acid vapors. 32,35 Meanwhile, triphenylamine group as a strong electron donor group and acylhydrazone group with certain electron-accepting properties can form a donor−acceptor (D− A) structure, giving the molecule a certain solvatochromic effect. 36 In addition, the introduced aclhydrazone group and long alkyl chain have the ability to induce molecular selfassembly to form a gel according to prior experience.…”

Development of Colorimetric and Turn‐On Fluorescence Sensor for the Detection of Al3+ and F− Ions: DNA Tracking and Practical Performance as Applications

“…There are many analytical tools like atomic absorption/emission/accelerator available and in usage by the researchers, lacks lower limits of certain cations and anions especially in the biological and environmental species. These techniques are moderately unpredictable, required expensive instrumentation, making them fallacious for onsite detection.…”