A new fluoride ion colorimetric sensor based on azo–azomethine receptors

RETRACTED: Synthesis and studies of selective chemosensor for naked-eye detection of anions and cations based on a new Schiff-base derivative

“…Schiff bases containing salicyaldimine based ligands can be used in the development of cost-effective chemosensors because they show significant color changes of the solution and maxima of the absorption bond when they interact with anions and cations [45][46]. Recently, we reported aneasy and applicable method for the preparation [47] and use of low cost chemosensors based on Schiff bases for the selective detection of some toxic metal ions and anions [48,49]. Herein, we report for the first time novel colorimetric studies on cation and anion sensing by chromogenic azo-azomethine receptor (L) possessing a phenolic OH group and binds F − and H 2 PO 4 − (anion binding site).…”

Synthesis, spectral characterization, thermal analysis and electrochemistry properties of Ni(II) complexes derived from azo dyes

“…7) shows two-step decomposition. The first decomposition step (243-329°C) corresponds to the loss of C 5 The data from the thermogravimetric analysis clearly indicated that the decomposition of the complexes proceeds in three stages for NiL 1 and NiL 3 and four steps for NiL 2 . In the first stage to third stage, complex NiL 1 shows mass losses of 5.97, 26.25 and 9.7 % in the temperature ranges 150-240, 240-520 and 520-800°C, corresponding to the elimination of NO 2 (calc.…”

“…The structure and absorption spectra of azo compounds, especially those containing phenolic moieties, are the subject of a large body of research due to their applications as textile dyes, acid base and redox indicators, metallochromic reagents and proton affinities [1][2][3][4]. Azo ligands containing salicylaldimine-based side chains can be used in the production of chemical sensors because they show a significant change of color of the solution and maxima of the absorption band when they interact with anions [5,6]. On the other hand, azo compounds are important due to their applications in dyes, pigments and functional materials.…”

One-Pot Microwave-Assisted Synthesis of Water-Soluble Pyran-2,4,5-triol Glucose Amine Schiff Base Derivative: XRD/HSA Interactions, Crystal Structure, Spectral, Thermal and a DFT/TD-DFT

“…For example, such Schiff bases from food derivatives are used in antibacterial, antimicrobial, antiviral, and other biological activities [7]. Moreover, they have been used in tumor cell imaging, conductive polymers, and optical sensors, as well as for detection of amino acids, fluoride, iron, and other heavy metals [8][9][10].…”