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Formation of Copper(II) Complexes with Low- and High-Methoxylated Pectins Modified with Salicylic and Anthranylic Acids

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Abstract

Low- and high-methoxylated pectins were synthesized and modified with anthranilic and salicylic acids to obtain effective polymeric ligands. On their basis, new copper(II) metal-polymer complexes were obtained, their composition was determined, stability constants and thermodynamic characteristics of the complex formation process were calculated. The efficiency of the metal binding to the polymer ligand depends mainly on the degree of pectin methoxylation, the acidity of the medium, the temperature of the process, and also on the structure of the pharmacologically active modifier acid. The thermal stability of polymeric copper(II) complexes increases with the introduction of an organic complexone into the polysaccharide and with a decrease in the degree of pectin methoxylation.

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Funding

The work was fulfilled in the framework of the Federal scientific research program of state academies for 2013-2020 (the state task no. AAAA-A20-120012090024-5) using equipment of “Chemistry” collective use Center of the Ufa Institute of science and “Agidel” Regional center for collective use of Ufa Federal research center of Russian Academy of Sciences.

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Authors and Affiliations

  1. Ufa Institute of Chemistry, Ufa Research Center, Russian Academy of Sciences, 450054, Ufa, Russia

    R. Kh. Mudarisova & S. V. Kolesov

  2. Bashkir State University, 450014, Ufa, Russia

    O. S. Kukovinets

Authors
  1. R. Kh. Mudarisova
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  2. O. S. Kukovinets
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  3. S. V. Kolesov
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Correspondence to R. Kh. Mudarisova.

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Mudarisova, R.K., Kukovinets, O.S. & Kolesov, S.V. Formation of Copper(II) Complexes with Low- and High-Methoxylated Pectins Modified with Salicylic and Anthranylic Acids. Russ J Gen Chem 90, 2134–2140 (2020). https://doi.org/10.1134/S1070363220110183

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