ПОЛИМЕРЛАР ФУНКЦИОНАЛ ГУРУХЛАРИНИНГ РЕАКЦИОН ҚОБИЛИЯТЛАРИ КВАНТКИМЁВИЙ НАЗАРИЯСИ КОНЦЕПЦИЯСИ ХАҚИДАГИ МУАММОЛАР

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ПОЛИМЕРЛАР ФУНКЦИОНАЛ ГУРУХЛАРИНИНГ РЕАКЦИОН ҚОБИЛИЯТЛАРИ КВАНТКИМЁВИЙ НАЗАРИЯСИ КОНЦЕПЦИЯСИ ХАҚИДАГИ МУАММОЛАР

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Background. Each molecule of a polymer substrate actually represents a whole spectrum of substrates (reaction centers) with different reactivity. The reactivity of polymers, which depends on many factors, including the presence of functional groups, is a collective concept, currently needs to be interpreted within the framework of the fundamental concepts of polymer physics and chemistry. This concept is a band gap in the electronic spectrum, representing the difference in the energies of the lowest free and highest occupied molecular orbitals of the polymer. Purpose. Discussion of the new concept of the quantum-chemical theory of the reactivity of polymers containing various functional groups on the example of the reactivity of N, O-carboxymethylchitosan in the preparation of nanoparticles. Methodology. Conductometric titration, NMR, IR spectroscopy, quantum chemical theory were used in the work. Originality, the question of the quantum-chemical theory of describing the reactivity of polymers containing different functional groups is considered by the example of obtaining Bombyx mori carboxymethylchitosan nanoparticles by precipitating coacervation (various substitutions both in oxygen at C6 (O- CMCh) and in nitrogen in C2 (N- CMCh). Findings. Nanoparticles of (O-, N-) carboxymethylchitosan of various sizes and shapes were obtained by the method of precipitating coacervation; a new concept for describing the reactivity of polymers was presented. It has been shown that the formation of nanoparticles implies an interaction between protonated amino groups and carboxyl anionic groups, with the formation of covalent and / or ionic bonds, which contributes to their stabilization. Highlights: * carboxymethylchitosan Bombyx mori nanoparticles are obtained; * a new concept for describing the reactivity of polymers is presented.

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# реакционная способность# электронный спектр# (О-# N-) карбоксиметилхитозан# наночастицы.# реакцион қобилият# электрон спектр# О-# N- карбоксиметилхитозан# нанозаррачалар.# reactivity# electronic spectrum# (O-# N-) carboxymethylchitosan# nanoparticles.

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Foydalanilgan adabiyotlar

Fukui K. Theor. Chem. Accts. // Cornell University Press. —1999. —V. 304. —P. 405– 413.

Bersuker I. The Jahn-Teller Effect and Vibronic Interactions in Modern Chemistry // Springer Science & Business Media. - 2013. – P. 319.

Beyder R. Atomy v molekulakh: Kvantovaya teoriya. Per. s angl.— M.: Mir, 2001. — 532 s.

Lusiana R. A., Siswanta D., Mudasir. and Hayashita T.// International Journal of Chemical Engineering and Applications. – 2013. – V. 4. - No 4. – P.231-235.

Pestov A.V. Yatluk YU.G. Karboksialkilirovannyye proizvodnyye hitina i hitozana. - Yekaterinburg: UrO RAN, 2017. - 85 c.

Rashidova S.SH., Klicheva O.B. Sintez N-zameshchennyh proizvodnyh hitozana Bombyxmori i formirovaniye nanochastits na ih osnove// Izvestiya Ufimskogo Nauchnogo tsentra RAN. – 2018. - No 3 (3). - S.95-97.

Takeshima T., Tada Y., Sakaguchi N., Watari F., Fugetsu B.// Nanomaterials. – 2015. – V.5. – No.1. – P.284-297.

Klicheva O.B., Aliev Kh.U., Batyrbekov A.A., Rashidova S.Sh. Synthesis of N-carboxymethylchitosan from Bombyx mori and its role in estimating hematological parameters // Chemistry of Natural Compounds. -2017. –No 4. - V. 53. – R. 726-728.

Seki Yoldas, Yurdakos Kadir // J. Appl. Polum. Sci. - 2008. - V. 109. -No1. - P. 683-690.

Klicheva O.B., Rashidova S.SH. Sravnitel'nyye kharakteristiki O- i N-karboksimetilirovannyh proizvodnyh hitozana Bombyxmori// Doklady Akademii nauk. – Tashkent. -2017. - No 1. - S.86-89.

Askarov B., Oksengendler B.L., Ivanova Ye.K., Nurgaliyev I.N., Konoplova M.V., Levitskaya YU.V., Rashidova S.SH. Elektronnaya struktura i reaktsionnaya sposobnost' biopolimerov s kompozitsionnym besporyadkom //Uzb. fiz. zhurnal. -Vol. 18. - No 1. - 2016. - S. 54-62.

Ivanova Ye.K., Askarov B., Nurgaliyev I.N., Konopleva M.V., Sheraliyeva SH., Oksengendler B.L., Rashidova S.SH. Polimery – novyy klass psevdoshchelevyh materialov // Uzb. fiz. zhurn. - T. 18. - No6. - 2016. - S. 412-420.