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PRODUCTION AND PROPERTIES OF METALLOCOMPLEXES OF COLLAGEN WITH IONS Fe2+, Co2+, Cr3+, Ni2+, Mg2+

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Background. In recent years, the field of use of complex compounds of polymers with metal ions is expanding, due to the unique and multifunctional properties of such coordination compounds. Organometallic compounds usually have a crystalline structure, are used in medicine, biotechnology, pharmaceuticals, agriculture, in various fields of chemical and textile industries. Protein substances containing several heteroatoms at once (nitrogen, oxygen, sulfur) are very prone to the formation of coordination complexes with very many metal ions. If fibroin and sericin of natural silk have been repeatedly considered as components of organometallic compounds, then tissue collagen and wool keratin remain poorly understood objects. Collagen is the most common polymer of living tissues; methods for isolating it from animal skin have been developed. Color complexes of collagen with metal ions can be a valuable raw material for the production of colored polymer materials. Purpose. Obtaining and studying the properties of coordination compounds of collagen with various metal ions - as potential dyes of textile fabrics and products. Methodology. Interaction with electron transfer in solutions, spectrophotometry, gravimetry, refractometry, viscometry, titrimetry, optical microscopy. Originality. The complexation of collagen with metal ions in solution, the nature of the chromophore groups of complex compounds, the dependence of some properties of the collagen solution and complexes on the nature of the metal ion and the ratio of the components are established. Findings. Coordination complexes of Fe2+, Co2+, Cr3+, Ni2+, Mg2+ ions with a natural polymer - collagen in water, at room temperature were obtained. Precipitating complexes from a solution in ethanol, isolated in the form of crystals. The dependence of the complex yield on the nature of the ion, the complex color on the structure and degree of dispersion, the chromophore groups of the complexes according to UV spectroscopy, and the solubility of the complex in various solvents are determined. Highlights: - Received complex compounds of metal ions with a protein macromolecule; - Collagen complexes with Fe2+, Co2+, Cr3+, Ni2+, Mg2+ ions are isolated in the form of crystals; - The color of the complexes is determined by the nature of the metal ion, the state, structure and dispersion of the crystals.

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# коллаген# collagen# ионы металлов# металл ионлари# metal ions# координационный комплекс# координацион комплекс# coordination complex

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https://eroi.uz/11.0030/A0921-0028

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