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1H-indole-based chemosensors for the sequential recognition of Hg+ and CN- ionsстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 декабря 2021 г.
- Авторы: Sayapin Yury A., Gusakov Eugeny A., Tupaeva Inna O., Karlutova Olga Yu, Dubonosova Irina V., Tkachev Valerii V., Starikov Andrey G., Dubonosov Alexander D., Aldoshin Sergey M.
- Журнал: Tetrahedron
- Том: 84
- Год издания: 2021
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 132030
- DOI: 10.1016/j.tet.2021.132030
- Аннотация: Сhemosensors based on 1H-indole, 1H-benzo[e]indole, and 1H-benzo[g]indole were synthesized. Accordingto 1H, 13C NMR, X-ray diffraction study and DFT calculations, they exist predominantly in ketoform, which absorbs at 371e404 nm and exhibit a low-intensity fluorescence at 454e527 nm. Recognitionof Hg2þ cations in acetonitrile results in a bathochromic shift of the long-wave absorption band by~20 nm, accompanied by a “naked-eye” effect that causes the colorless solution to turn bright yellow. Atthe same time, the emission of sensors is completely quenched. The in situ mercury(II) complexessequentially and selectively detect CN anions with full restoration of the initial absorption and fluorescencespectra. The fluorescence “oneoffeon” cycles generated by the consistent addition of Hg2þ andCN ions provide the obtained compounds with the properties of ionochromic molecular switch. Thevalues of the limit of detection are 1.8 and 0.83 mМ for Hg2þ and CN ions, respectively.
- Добавил в систему: Алдошин Сергей Михайлович