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On-site and low-cost detection of cyanide by simple colorimetric and fluorogenic sensors: Smartphone and test strip applications
Scopus
Toplam 131 atıf DOI
Cyanide is potentially hazardous and quickly acting chemical used in many fields of industry. Therefore, detection of cyanide is of main health concern due to its serious impacts on living organisms. In this context, we have developed rapid, low-cost and on-site sensory two molecules for the colorimetric and fluorogenic sensing of cyanide ion in aqueous samples and food samples. The prepared probes undergo distinct visual color change and exhibits selective fluorogenic turn-on or turn-off response towards cyanide. Competing anions have little or negligible effect on the detection of cyanide. The limit of detection for cyanide ion was calculated as low as 0.45 μM. Free receptors could be successfully regenerated by treating them with Ag+ ion. Moreover, a new visual colorimetric strip based on paper was fabricated with the pale yellow-to-pink color change signal. The fabricated test strips also demonstrated excellent selectivity towards cyanide ion without interfering possible fluoride and acetate ions. The smartphone-based technique which could directly read out the color value using a smartphone revealed an excellent potential for the cyanide detection without additional device.
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Phenanthroimidazole and dicyanovinyl-substituted triphenylamine for the selective detection of CN−: DFT calculations and practically applications
Scopus
Havuzumuzda 33 atıf almış
A novel CN− selective fluorescent turn-on sensor (TPMN) possessing triphenylamine and phenanthroimidazole as signaling units and dicyanovinyl unit for the binding site was designed and synthesized. TPMN exhibited a drastic change in its emission spectra with about 13-fold fluorescence enhancement when treated with CN−, while other tested anions could not arouse the fluorescence enhancement. The experimental and theoretical calculation results showed that this increase in fluorescence intensity of TPMN in presence of CN− is due to the large decrease in the ICT effect by the addition of CN− ion to β-carbon of the dicyanovinyl moiety. TPMN could selectively detect CN− with a detection limit of 0.23 μM among the common anions. The CN−-binding mode was well-characterized to be 1:1 by using Job's plot with an association constant of 5.36 (logKa). Besides, the possible utilization ofTPMN was successively tested in water samples and test kits.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey