Ionic liquids, associations of organic cations and anions, are media organized over several nanometers and present a segregation in polar and nonpolar microdomains. As they are used as solvents for catalytic reactions, they can induce specific solvation phenomena. For instance, ion exchange reactions in some catalytic systems and some py-cation interactions with unsaturated hydrocarbons have been observed by NMR. It appears that the stronger the interactions between IL and reactants are, the slower the reactions are. The consequences of the specific solvation on hydrogenation reactions have been studied. The presence of nonpolar and polar microdomains leads to a preferential solvation of organometallic complexes in apolar pockets that enable the use of these media as supramolecular matrices and to control the crystal growth of metal nanoparticles generated in situ according to the alkyl chain length and the temperature.
Ionic liquids, use and specific task as solvent in catalytic reaction
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Книга по Требованию
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Изучение возможности применения магнитных жидкостей для синтеза магнитных...
Министерство народного образования Республики Беларусь Беларусский ордена трудового красного знамени государственный университет имени В.И. Ленина Химический факультет Кафедра неорганической химии Изучение возможности применения магнитных жидкостей для синтеза магнитных сорбентов Дипломная работа студентки 5-го курса Кекало Екатерины Александровны Руководитель канд. хим. наук, доцент Н.Н. Горошко Рецензент доктор хим. наук, профессор Е.А. Стрельцов Дипломник Е.А. Кекало ласцiвасцей. his work devo es o s udy he possibili y of use he ferrofluids for mag e ic sorbe s sy heses. I he prese work ew me hods of recep io of he mag e ic sorbe s, based o use of various mag e ic liquids are submi ed Use of a liquid ma erial for impreg a io of a sorbe (a d givi g o i hus mag e ic proper ies) favourably dis i guishes he way offered by us from described i he li era ure. Applica io of various mag e ic liquids (as agai s mag e i e he cer ai s ruc ure) allows o vary proper ies of a received sorbe over a wide ra ge. Researches have show , ha a mag e iza io of a sorbe by mea s of mag e ic liquids i s specific surface decreases a li le bi . hus, he sorbe ge s valuable mag e ic proper ies o losi g he i dividual proper ies. . Приложение Рис.24 Результат термического анализа активированного угля Потери массы, % Температура, єС Рис.25 Результат термического анализа активированного угля с магнетитом Потери массы, % Температура, єС Рис.26 Результат термического анализа активированного угля, пропитанного МЖ (водн, олеат ТЭА) Потери массы, % Температура, єС
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