A new derivative of 8-hydroxyquinoline. Features of distribution and complexation with Cu(II) and Zn(II) in two-phase systems. Issue 3 (16th April 2022)

• Record Type: Journal Article
• Authors: Konshina, Dzhamilya N.; Lupanova, Ida A.; Efimenko, Sergey E.; Konshin, Valery V.
• Is Part Of: Solvent extraction and ion exchange. Volume 40:Issue 3(2022)
• Page Start: 236
• Page End: 250
• Publication Date: 2022-04-16
• Subjects: Derivative of 8-hydroxyquinoline -- liquid–liquid extraction -- zinc -- copper; Solvent extraction -- Periodicals; Ion exchange -- Periodicals; 660.284248
• DOI: 10.1080/07366299.2021.1910271
• Languages: English
• ISSNs: 0736-6299

Abstract

ABSTRACT: A new promising analytical reagent is proposed for the extractive recovery of Cu(II) and Zn(II). The reagent is produced upon azo coupling of 8-hydroxyquinoline with diazotized 4-(prop-2-yn-1-yloxy)aniline in yield of 54%. Its structure was confirmed by the combined data from IR, 1 Н, and 13 С NMR spectroscopy, and HRMS. The UV-VIS absorption spectra suggests an azo-hydrazone tautomerism to exist in the 2-ethoxyethanol medium and 5-(4-(prop-2-ynyloxy)phenylazo)quinolin-8-ol to be present in a chloroform or acetonitrile solution predominantly as the azo form. The extraction behavior of 5-(4-(prop-2-ynyloxy)phenylazo)quinoline-8-ol with regard to Cu(II) and Zn(II) in a chloroform–water system was studied. The stoichiometry of the extracted complex compounds and the conditional extraction constant were calculated.