Inherent heterogeneities and nanostructural anomalies in organic glasses revealed by EPR

Mikhail Yu Ivanov, Olga D. Bakulina, Dmitriy V. Alimov, Sergey A. Prikhod'Ko, Sergey L. Veber, Svetlana Pylaeva, Nicolay Yu Adonin, Matvey V. Fedin

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Intriguing heterogeneities and nanostructural reorganizations of glassy ionic liquids (ILs) have recently been found using electron paramagnetic resonance (EPR) spectroscopy. Alkyl chains of IL cations play the key role in such phenomena and govern the anomalous temperature dependence of local density and molecular mobility. In this paper we evidence and study similar manifestations in a variety of common non-IL glasses, which also contain molecules with alkyl chains. A series of phthalates clearly demonstrates very similar behavior to imidazolium-based ILs with the same length of alkyl chain. Glasses of alkyl alcohols and alkyl benzenes show only some similarities to the corresponding ILs, mainly due to a lower glass transition temperature hindering the development of the anomaly. Therefore, we demonstrate the general nature and broad scope of nanoscale structural anomalies in organic glasses based on alkyl-chain compounds. The 'roadmap' for their occurrence is provided, which aids in understanding and future applications of these anomalous nanoheterogeneities.

Язык оригиналаанглийский
Страницы (с-по)4973-4978
Число страниц6
ЖурналNanoscale Advances
Том3
Номер выпуска17
DOI
СостояниеОпубликовано - 7 сен 2021

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ
  • 2.11 ПРОЧИЕ ТЕХНОЛОГИИ
  • 1.04 ХИМИЧЕСКИЕ НАУКИ
  • 2.05 ТЕХНОЛОГИЯ МАТЕРИАЛОВ

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