Abstract
Spectral methods have been used to study the complexation of apple pectin modified with organic pharmacophores (nicotinic, salicylic, 5-aminosalicylic, or anthranilic acid) with Cu2+, Co2+, and Mn2+ ions in an aqueous solution. The composition and stability series of the metal complexes, corresponding to the empirical Irving–Williams series, have been established. The standard thermodynamic parameters (ΔH°, ΔG°, and ΔS°) of the complexation process have been calculated. It has been shown by means of 13C NMR and IR spectroscopy that the interaction of pharmacophore-containing pectins with d-metal ions (Cu2+, Co2+, Mn2+) occurs via the carbonyl and hydroxyl groups of the modified polymer matrices. The viscosity and thermal properties of the metal complexes have been determined.
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This study was performed in the scope of the Program for Fundamental Research of State Academies for 2019–2021 (State Task no. АААА-А17-117011910026-3) using the equipment of the Center for Collective Usage “Chemistry,” Ufa Federal Research Center of Russian Academy of Sciences.
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Mudarisova, R.K., Sagitova, A.F., Kukovinets, O.S. et al. Metal Complexes of Pharmacophore-Containing Pectin with d-Elements Ions (Cu2+, Co2+, and Mn2+). Russ J Gen Chem 90, 660–666 (2020). https://doi.org/10.1134/S1070363220040167
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DOI: https://doi.org/10.1134/S1070363220040167