Colorimetric Chemosensor Array for Determination of Halides

Abstract

The halide anions are essential for supporting life. Therefore, halide anion analyses are of paramount importance. For this reason, we have performed both qualitative and quantitative ana- lyses of halides (chloride, bromide, iodide) using the Tl(III) complex of azodye, 4-(2-pyridylazo)re- sorcinol (PAR), a potential new chemical reagent/sensor that utilizes the substitution reaction whereas the Tl(III)PAR complex reacts with a halide to yield a more stable thallium(III)-halide while releasing the PAR ligand in a process accompanied by color change of the solution. The experimental conditions (e.g., pH, ratio metal ion-to-ligand ratio, etc.) for the substitution reaction between the metal complex and a halide were optimized to achieve increased sensitivity and a lower

Development of multi-analyte responsive sensors: optical discrimination of arsenite and arsenate ions, ratiometric detection of arsenite, and application in food and water samples

“…Additionally, ratiometric detection of the arsenite anion was demonstrated by N4R1-N4R3. 1 H-NMR titration and mass spectral analysis confirmed the 1 : 1 complex formation between the receptors and anions (arsenite, arsenate, and phosphate). Experimental results were validated by DFT and TD-DFT studies, and reversibility studies were conducted for arsenate and phosphates with calcium ions.…”

“…The development of colorimetric as well as fluorescent chemosensors has gained immense attention in the supramolecular research arena due to their improved selectivity and sensitivity. 1,2 The chemosensors were widely designed for the detection of various cations, anions, and small molecules. [1][2][3][4][5][6][7][8] The great need for developing optical sensors for ionic detection is also due to the increased pollution rates in the aquatic system by contamination by various ions.…”

“…1,2 The chemosensors were widely designed for the detection of various cations, anions, and small molecules. [1][2][3][4][5][6][7][8] The great need for developing optical sensors for ionic detection is also due to the increased pollution rates in the aquatic system by contamination by various ions. The traditional instrument-based detection process could not be sufficient for routine analysis of water samples.…”

Electrochemical Sensing of Urinary Chloride Ion Concentration for Near Real-Time Monitoring

“…Optical chemosensors [ 7 , 13 , 22 , 23 ] and electrochemical sensors [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ] have been investigated for cost effective, near real-time chloride detection. Optical chemosensors are typically paper-based sensors [ 14 , 16 , 31 ] (e.g., dipsticks); due to their portability, they have been widely used in qualitative field studies [ 18 ].…”

Perchlorate Solid-Contact Ion-Selective Electrode Based on Dodecabenzylbambus[6]uril

“…In the case of less complex samples, it is useful to apply MS instrumentation directly in order to get semiquantitative information [22][23][24][25]. The application of methods based on molecular spectroscopy, such as absorption, luminescence, Raman, etc., is rare due to the lack of chemosensors selective for the perchlorate anion in comparison with halides [12,[26][27][28][29][30], while most papers utilize the formation of the ionic dye-perchlorate associates in less polar solvents. This can be combined with extraction of ionic associates from aqueous solution to an immiscible organic solvent or surfactants forming micelles (cloud-point extraction) [18,19,28].…”