Methods of dissociative electron capture spectroscopy and density functional theory for modeling the biological activity of quinoxalin derivatives

Автор: Tayupov Mansaf M., Rakhmeev Rustam G., Markova Angelina V., Safronov Aleksey M.

Журнал: Математическая физика и компьютерное моделирование @mpcm-jvolsu

Рубрика: Моделирование, информатика и управление

Статья в выпуске: 2 т.24, 2021 года.

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The molecules of 2-methylquinoxalin and 2,3-dimethylquinoxalin were studied by the method of mass spectrometry of negative ions of resonant capture of slow (0-15 eV) electrons. These compounds have antimicrobial, antifungal, bactericidal and preservative properties, and are widely used in medicine and the food industry. The average lifetime of molecular negative ions (NI)relative to electron auto-cleavage is measured experimentally. The most probable structures of fragment ions ([M - H]˘, formed during the decay of molecular NI, are revealed. Within the framework of the Arrhenius approximation, the value of the adiabatic electron affinity (EAa) was estimated. Itis found that the theoretical values of calculated by the B3LYP/6-31+G(d)method with minimal addition of diffuse functions as the difference between thetotal energies of the neutral molecule and the radical anion correlate with the values of obtained from the experiment.

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Dissociative electron capture spectroscopy, quantum chemical calculations, resonant electron capture, toxic substances, cytochrome 450, medical preparations

Короткий адрес: https://sciup.org/149138016

IDR: 149138016   |   DOI: 10.15688/mpcm.jvolsu.2021.2.5

Статья научная