EPR spectra of deuterated methyl radicals trapped in low temperature matrices

• Опубліковано в: Физика низких температур
• Дата: 2005
• ISSN: 0132-6414
• Автор: Dmitriev, Yu.A.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2005
• Теми: Физические свойства криокристаллов
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/121463
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: EPR spectra of deuterated methyl radicals trapped in low temperature matrices / Yu.A. Dmitriev // Физика низких температур. — 2005. — Т. 31, № 5. — С. 558-564. — Бібліогр.: 13 назв. — англ.

EPR spectra of CHD₂, and CD₃ radicals have been investigated in low-temperature matrices of
 H₂, D₂, and Ne at temperatures 1.6–4.2 K. A method of condensation from the gas phase on a cold
 substrate has been used. With decreasing sample temperature, a transformation of the shape of the
 CD₃ spectrum in H₂, D₂, and Ne matrices and CHD₂ spectrum in H₂ and Ne was observed. This
 transformation was reversible in the above temperature range. The temperature effects are explained
 as reflecting a change in the populations of the lowest rotational states of the radicals.
 Based on the present data and known results for deuterated methyl radicals in Ar obtained in
 photolytic experiments, we compare the temperature behavior of the EPR spectra for the radicals
 trapped in various matrices. As a result an existence of a hindering barrier for the radical rotation
 is suggested.