Metal Complexes of Pharmacophore-Containing Pectin with d-Elements Ions (Cu2+, Co2+, and Mn2+)

Spectral methods have been used to study the complexation of apple pectin modified with organic pharmacophores (nicotinic, salicylic, 5-aminosalicylic, or anthranilic acid) with Cu 2+ , Co 2+ , and Mn 2+ ions in an aqueous solution. The composition and stability series of the metal complexes, corres...

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Bibliographic Details
Published in:Russian journal of general chemistry 2020-04, Vol.90 (4), p.660-666
Main Authors: Mudarisova, R. Kh, Sagitova, A. F., Kukovinets, O. S., Kolesov, S. V.
Format: Article
Language:English
Subjects:
Aqueous solutions
Carbonyls
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Cobalt
Complexation
Coordination compounds
Copper
Hydroxyl groups
Infrared spectroscopy
Manganese ions
NMR
Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Pectin
Pharmacology
Spectral methods
Thermodynamic properties
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Summary:Spectral methods have been used to study the complexation of apple pectin modified with organic pharmacophores (nicotinic, salicylic, 5-aminosalicylic, or anthranilic acid) with Cu 2+ , Co 2+ , and Mn 2+ 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 (Δ H °, Δ G °, and Δ S °) of the complexation process have been calculated. It has been shown by means of 13 C NMR and IR spectroscopy that the interaction of pharmacophore-containing pectins with d -metal ions (Cu 2+ , Co 2+ , Mn 2+ ) occurs via the carbonyl and hydroxyl groups of the modified polymer matrices. The viscosity and thermal properties of the metal complexes have been determined.
ISSN:1070-3632
1608-3350
DOI:10.1134/S1070363220040167