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A Novel Family of Cage-like (CuLi, CuNa, CuK)-phenylsilsesquioxane Complexes with 8-hydroxyquinoline Ligands: Synthesis, Structure, and Catalytic Activityстатья
- Авторы: Bilyachenko A.N., Khrustalev V.N., Zueva A.Y., Titova E.M., Astakhov G.S., Zubavichus Y.V., Dorovatovskii P.V., Korlyukov A.A., Shul'pina L.S., Shubina E.S., Kozlov Y.N., Ikonnikov N.S., Gelman D., Shul'pin G.B.
- Журнал: Molecules
- Том: 27
- Номер: 19
- Год издания: 2022
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Номер статьи: 6205
- DOI: 10.3390/molecules27196205
- Аннотация: The first examples of metallasilsesquioxane complexes, including ligands of the 8-hydroxyquinoline family 1–9, were synthesized, and their structures were established by single crystal X-ray diffraction using synchrotron radiation. Compounds 1–9 tend to form a type of sandwich-like cage of Cu4M2 nuclearity (M = Li, Na, K). Each complex includes two cisoid pentameric silsesquioxane ligands and two 8-hydroxyquinoline ligands. The latter coordinates the copper ions and corresponding alkaline metal ions (via the deprotonated oxygen site). A characteristic (size) of the alkaline metal ion and a variation of characteristics of nitrogen ligands (8-hydroxyquinoline vs. 5-chloro-8-hydroxyquinoline vs. 5,7-dibromo-8-hydroxyquinoline vs. 5,7-diiodo-8-hydroxyquinoline) are highly influential for the formation of the supramolecular structure of the complexes 3a, 5, and 7–9. The Cu6Na2-based compound 2 exhibits high catalytic activity towards the oxidation of (i) hydrocarbons by H2O2 activated with HNO3, and (ii) alcohols by tert-butyl hydroperoxide. Studies of kinetics and their selectivity has led us to conclude that it is the hydroxyl radicals that play a crucial role in this process.
- Добавил в систему: Астахов Григорий Сергеевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | molecules-27-06205-with-cover.pdf | 13,3 МБ | 27 января 2023 [AstakhovGS] | |
| 4. | Полный текст | molecules-27-06205.pdf | 3,4 МБ | 21 сентября 2022 [AstakhovGS] |