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Radical activity of binary melamine-based hydrogen-bonded self-assembliesстатья
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: 23 декабря 2020 г.
- Авторы: Shilovskikh V.V., Timralieva A.A., Belogub E.V., Konstantinova E.A., Kokorin A.I., Skorb E.V.
- Журнал: Applied Magnetic Resonance
- Том: 51
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 939
- Последняя страница: 949
- DOI: 10.1007/s00723-020-01254-6
- Аннотация: Melamine cyanurate and melamine barbiturate self-assembled materials were prepared andstudied by the electron paramagnetic resonance (EPR) spectroscopy, optical and scanningelectron microscopy, X-ray powder diffraction (XRD). Both optical and electron microscopyshow the formation of microscale crystalline particles possessing complex layered structureswith a highly stable appearance. Both assemblies tend to form twinned crystals, which in thebarbiturate case leads to multiple twinning in every particle. Optical microscopy shows highanisotropy and birefringence of both materials. XRD data represents a high crystallinity ofmelamine barbiturate and much lower for melamine cyanurate. Studied materials reveal the ability to incorporate radicals that correlates with their crystal structure quality. It is attributed tothe structure-dependent stabilization of active radical superoxide species in structure voids ordefects. On the example of melamine barbiturate, it is shown that the number of activeparamagnetic centers increases at ca. 22 % when a substance is irradiated with UV+Vis light. Itreaches saturation in approximately 20 minutes, whereas only ca. 14 % decrease observed in aweek.
- Добавил в систему: Константинова Елизавета Александровна