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A series of 8-hydroxyquinoline benzoates with diverse azo substituents were synthesized by diazo-reaction of 2-methyl-8-hydroxyquinoline with some arylamines, followed by esterification with benzoyl chloride. All the products allowed selective sensing with Hg 2+ , which was affirmed by UV–vis absorption spectra. Different spectral changes were observed for these compounds with electron-donating...
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