Glass formation in the Mg(CH3COO)2–(CH3)2SO–H2\cyrcharCYROsystemandthepreparationofalow-toxicitycryoprotector

Авторы: Kirilenko I.A., Tarakanova E.G., Mayorov A.V., Demina L.I., Danilov V.P.
Журнал: Journal of Non-Crystalline Solids
Том: 594
Год издания: 2022
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 121825
DOI: 10.1016/j.jnoncrysol.2022.121825
Аннотация: Glass formation in the Mg(CH3COO)2–(CH3)2SO–H2O system is found to occur and studied by calorimetry, IR spectroscopy, and density functional theory calculations. Experimental and quantum-chemical data are analyzed jointly in terms of the previously recognized structure-formation laws in aqueous and nonaqueous solutions. The first low-toxicity cryoprotector is developed and tested. The structure and energy parameters of polymer chains are determined in three glass-forming compositions of the Mg(CH3COO)2–(CH3)2SO–H2O system. The structure of these chains, which are built of magnesium hexasolvates linked via CH3COO− ions and water molecules, is found to obey the structure formation laws that operate in solutions. Competition among (CH3)2SO, H2O, and CH3COO− species for entering the first coordination sphere of Mg2+ is studied. The hydrogen-bonded crystallization-resistant glasses are found to differ from crystallization-liable glasses by higher specific linking strengths (referred to the unit weight) of polymer-chain units.
Добавил в систему: Демина Людмила Ивановна

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