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Self-assembly involving alkanediammonium ions and stereospecific [2+2] photocycloaddition of (18-crown-6)stilbeneстатья
- Авторы: Martyanov T.P., Vorozhtsov A.P., Aleksandrova N.A., Sulimenkov I.V., Slesarenko N.A., Ushakov E.N., Gromov S.P.
- Журнал: Russian Chemical Bulletin
- Том: 72
- Номер: 3
- Год издания: 2023
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 740
- Последняя страница: 748
- DOI: 10.1007/s11172-023-3838-2
- Аннотация: Complexation between (18-crown-6)stilbene and alkanediammonium ions +H3N(CH2)nNH3+ (n = 2−4) resulting in the pseudo-sandwich 2:1 stilbene—dication complexes and 1:1 stilbene—dication complexes was studied by NMR spectroscopy. The stability of the complexes decreases as the methylene chain length in the alkanediammonium ion increases. UV photolysis of the bis-ligand complexes produces two major products, viz., the rctt isomer of a biscrown-containing cyclobutane derivative formed as a result of intra-supramolecular [2+2] photocycloaddition and a crown-containing phenanthrene derivative (product of electrocyclization reaction). The effective quantum yields of both cyclization reactions occurring in the pseudo-sandwich complexes increase as the number of methylene units in the dication decreases.
- Добавил в систему: Громов Сергей Пантелеймонович