Fluorescent Chemodosimeter for Selective Detection of Cyanide in Water

Abstract

A coumarin-based fluorescent chemodosimeter with a salicylaldehyde functionality as a binding site has been developed for selective detection of cyanide anions over other anions in water at biological pH.

Novel salicylaldehyde derivatives as fluorescence turn-on sensors for cyanide ion

“…It is however wildly used (1.5 million tons per year) and its poisoning may occur in particular receptors include borane [12,13], indolium [14,15] and hydrogenbonded carbonyl compounds [16,11], many of which are related to the reduction of intramolecular charge transfer (ICT) process. The ICT process is situated in a -conjugated molecular system consisting of electron donating and accepting groups [17][18][19][20].…”

A novel glycoconjugated N-acetylamino aldehyde hydrazone azo dye as chromogenic probe for cyanide detection in water

“…Typically, a colorimetric anion probe is constructed by combining a chromophore and an anion binding unit. In many cases, the anion binding unit is primarily composed of H-bond donors [6][7][8][9][10][11][12]. H-bonding interactions between an anion and the H-bond donors in a sensing system can induce internal charge transfer (ICT), which cause a change in the absorption of the chromogenic probe, thus allowing the naked eye colorimetric chemosensing (Scheme 1) [13][14][15].…”

“…on H-bonding interactions, show great selectivity for F − , which has significant basicity as well as the strongest H-bonding ability [6][7][8][9][10][11][12]. Recently, we reported a new glycoconjugated water soluble chemosensor [20] able to detect the cyanide anions in pure water but with a low detection limit, about 2.0 × 10 −5 mol L −1 , which is similar to the most recently reported colorimetric methods for cyanide determination [21][22][23][24][25][26][27].…”

Intra-molecular hydrogen bonding stabilization based-fluorescent chemosensor for CO 2 : Application to screen relative activities of CO 2 absorbents

“…For example, two amide protons at an oxyanion hole in a serine protease active site can bind to a deprotonated oxygen generated in the enzymatic peptide hydrolysis process to result in an intermediate-stabilizing hydrogen bond [37,38]. Recently, this interaction was utilized in host compounds to recognize CN - [39][40][41][42][43][44][45]. Similar to intermediate stabilization in the protease enzymatic process, these receptors recognized CN -by strong intramolecular hydrogen bonds through ionic hydrogen acceptors in receptor-CN -adducts.…”