Abstract
In order to study the mechanism of interaction of 4-(2-thiazolylazo)catechol with natural sulfides specifically with sulfides of various metals, the complexation of this azo compound with copper(II), cobalt(II), nickel(II), and zinc(II) ions in aqueous solutions was investigated. The reagent forms positively charged complexes with metal ions in the range of pH = 5.8—11.1. Their composition and structure, range of existence and stability constants were determined. An anionic complex with copper(II) formed at pH = 12.3—13.2. The structure of surface complex compounds formed on metal sulfides was proposed.
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The work was carried out using the facilities of the Multi-user Center “Materials and Substances Research” of the Perm Federal Research Center of the Ural Branch of the Russian Academy of Sciences.
This work was financially supported by the Russian Foundation for Basic Research (Project No. 17-03-00727 a). The work was carried out as part of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (Theme No. AAAA-A18-118032790022-7).
Based on the materials of the XXI Mendeleev Congress on General and Applied Chemistry (September 9–13, 2019, St. Petersburg, Russia).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 0965–0970, May, 2020.
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Gogolishvili, V.O., Gusev, V.Y. Investigation of complexation of 4-(2-thiazolylazo)catechol with CuII, CoII, NiII, and ZnII ions in aqueous solutions as a method for the study of their interaction with natural sulfides. Russ Chem Bull 69, 965–970 (2020). https://doi.org/10.1007/s11172-020-2856-x
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DOI: https://doi.org/10.1007/s11172-020-2856-x