|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
Structural features of polyphenothiazine and polyphenoxazine heterocyclic polyazinesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
- Авторы: Ozkan S.Zh, Petrov V.A., Muratov D.G., Filatova M.P., Bondarenko G.N., Karpacheva G.P.
- Журнал: Reactive and Functional Polymers
- Том: 218
- Год издания: 2026
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 106518
- DOI: 10.1016/j.reactfunctpolym.2025.106518
- Аннотация: In this study, we investigated the structural features of heterocyclic polyazines containing nitrogen and sulfur or oxygen heteroatoms. Semi-ladder polymers—polyphenothiazine (PPTA) and polyphenoxazine (PPOA)—were synthesized as model polyazine systems. These polymers were prepared via in situ interfacial oxidative polymerization of phenothiazine (PTA) or phenoxazine (POA) monomers, followed by post-modification in DMF with solvent removal under heating. We established a clear relationship between the polymers' structure and their properties, highlighting the influence of heteroatom type (S vs. O), synthesis conditions, and post-modification on their morphology, electrical conductivity, and thermal stability. Post-modification in DMF enhanced the polymerization degree of PPTA through polycondensation of crystalline oligomers, while PPOA underwent partial dehydrogenation, forming quinodiimine groups. Frequency-dependent electrical conductivity analysis of PPTA and PPOA revealed a hopping charge transfer mechanism (n = 0.89–0.97, where 0 ≤ n ≤ 1). The polymers demonstrate a gradual increase in conductivity in the frequency range of 25–106 Hz. Heterocyclic polyazines exhibited superior thermal stability, retaining 50–51 % of their mass at 1000 °C in an inert atmosphere, irrespective of the synthesis route. At the same time, modified polymers have higher thermal stability up to 500 °C. These results demonstrate the potential of tailored heterocyclic polyazines for applications in electrochemical devices, where tunable conductivity and thermal resilience are critical.
- Добавил в систему: Озкан Света Жираслановна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|