An improved organic/inorganic solid receptor for colorimetric cyanide-chemosensing in water: towards new mechanism aspects, simplistic use and portability

Abstract

A heterogeneous reaction-based colorimetric chemodosimeter toward cyanide anions was designed based on a hybrid pyrylium/alumina probe which possesses a great selectivity for CN(-) over other common anions even at significantly higher concentrations. The synergistic incorporation of the inorganic matrix and the organic receptor can play a pivotal role in the convenient field-usable determination of this toxic anion in water. Moreover, the catalytic properties coming from the inorganic matrix can greatly amplify the sensor performance.

Cell permeable fluorescent colorimetric Schiff base chemoreceptor for detecting F− in aqueous solvent

“…The widespread application of this particular ion has necessitated the development of simple and novel receptors which have very easy making processes and can detect F -at low level too [16][17][18]. In this regard it is needless to say that development of potential colorimetric fluorescent receptors has A c c e p t e d M a n u s c r i p t innate advantages over receptors which are non colorimetric or non fluorescent in nature [19][20][21][22].…”

Synthesis of 2-aroylfuran and novel 3,5-diaroyl-4-arylisoxazole derivatives by ring contraction of pyrylium salts

“…In continuation of our systematic research on the reactions of pyrylium and thiopyrylium salts [26][27][28][37][38][39][40][41][42], reactions between triarylpyrylium perchlorates and sodium nitrite were investigated. Nucleophilic reaction of triarylpyrylium salts with sodium nitrite in the presence of a variety of organic solvents, for example ethanol, acetonitrile, dichloromethane, and toluene, among others, resulted in mixtures of compounds in poor yields, in agreement with previously reported research [45].…”

“…Because of the importance of both the isoxazole and furan structures, and in continuation of our efforts to develop new synthetic methods for promising molecules [26][27][28][37][38][39][40][41][42], we report, for the first time, a new, highly practical, and eco-friendly approach for synthesis of novel 3,5-diaroyl-4-arylisoxazole 2 and 2-aroylfuran 3 derivatives by novel ring contraction of readily available triarylpyrylium salts 1 with sodium nitrite in the presence of 1-n-butyl-3-methylimidazolium bromide, [bmim]Br, as promoter and efficient reaction medium (Scheme 1).…”

“…Because readily available pyrylium salts can function as intermediates in a very wide variety of syntheses, because of their high reactivity toward nucleophiles, their use as simple and available precursors has attracted much interest [26][27][28].…”

Bicinchoninic acid-based colorimetric chemosensor for detection of low concentrations of cyanide

“…Moreover, as they often enable detections only with naked eyes, they have been gaining popularity in recent years for analyzing a variety of chemical agents, including cyanide [25,40,41]. In one example, a cyanide colorimetric chemosensor based on zincon (2-carboxy-20-hydroxy-50-sulfoformazylbenzene) was shown to detect cyanide in aqueous solutions with a detection limit of 0.13 ppm and a color change that could be observed by the naked eye [42].…”