Abstract
A novel fluorescent probe, DHMP {7-(dibutylamino)-3-methyl-1H,3′H-spiro[chromeno[2,3-c]pyrazole-4,1′-[2]benzofuran]-3′-one} was designed and synthesized by condensation of 2-[4-(dibutylamino)-2-hydroxybenzoyl]benzoic acid with 5-methyl-2,4-dihydropyrazol-3-one. The ultraviolet absorption and fluorescence emission spectra of DHMP showed a clear pH dependence and highly selective and sensitive response to copper(II) ions in aqueous medium. The detection limit of Cu2+ was estimated at 9.05 × 10−8 M.
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Yue, Y., Xie, Z., Chu, Y. et al. A Novel Fluorescent Probe Based on Spiro[chromeno[2,3-c]pyrazole-4,1′-[2]benzofuran]-3′-one for Detecting Copper(II) ions in Aqueous Solution. Russ J Org Chem 55, 866–873 (2019). https://doi.org/10.1134/S1070428019060186
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DOI: https://doi.org/10.1134/S1070428019060186