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Reversible ON-OFF switching of FRET effect in the functionalized CB[6]-guest complex via photoisomerizationстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 апреля 2021 г.
- Авторы: Chernikova Ekaterina Y., Grachev Alexander I., Peregudov Alexander S., Fedorova Olga A., Fedorov Yuri V.
- Журнал: Dyes and Pigments
- Год издания: 2021
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 109194
- DOI: 10.1016/j.dyepig.2021.109194
- Аннотация: Host-guest complexation of amino-substituted styryl dye in basic (ASP) and protonated (ASPH+) forms with cucurbit[6]uril functionalized with naphthalene fluorophore (CB[6]-Nap) was used to obtained photoresponsive supramolecular systems with fluorescence resonance energy transfer (FRET) effect. Energy transfer from the naphthalene group of CB[6]-Nap (energy donor) to ASP or ASPH+ (energy acceptor) in inclusion complexes takes place with an efficiency of 75% and 92%, respectively. E-Z photoisomerization of ASPH+ in the presence and in the absence of CB[6]-Nap has been thoroughly investigated by UV/Vis absorption and fluorescence spectroscopy and NMR spectroscopy. The bending of ASPH+ structure upon E- to Z- isomerization leads to dissociation of the host-guest complex and, as a consequence, to the disappearance of energy transfer, while the back photoisomerization returns the system to its original state. Thus, light-controlled encapsulation and release of dye molecule in the ASPH+@CB[6]-Nap complex allow the FRET process to be reversibly switched. The results obtained demonstrated a novel example of the spatiotemporal control of complexation and fluorescence response in the supramolecular system by light.
- Добавил в систему: Черникова Екатерина Юрьевна
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