تقرير
Dynamics of Butane and 1-Butene in ZIF-8 Probed by Solid-State 2H NMR
| العنوان: | Dynamics of Butane and 1-Butene in ZIF-8 Probed by Solid-State 2H NMR |
|---|---|
| المؤلفون: | Khudozhitkov, Alexander E., Arzumanov, Sergei S., Kolokolov, Daniil I., Stepanov, Alexander G. |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Chemical Physics, Condensed Matter - Materials Science |
| الوصف: | We present a detailed $^{2}$H NMR characterization of molecular mobility of 1-butene and n-butane propagating through the microporous ZIF-8, a zeolitic imidazolate framework renowned for its outstandingly high stability and separation selectivity of various. The experimental characterization of n-butane and 1-butene diffusivity in ZIF-8 on the molecular scale is provided for the first time. With $^{2}$H NMR spin relaxation analysis we have elucidated the motional mechanism for 1-butene and n-butane guests trapped within ZIF-8 framework and derived kinetic parameters for each type of motion. The characteristic times for microscopic translational diffusion and activation barriers (E$_{C4H10}$ = 34 kJ mol$^{-1}$, E$_{C4H8}$ = 32 kJ mol$^{-1}$) for n-butane and 1-butene diffusivities have been elucidated. Finally, we show that $^{2}$H NMR technique is capable to provide reliable information on microscopic diffusivity in the ZIF-8 MOF even for molecules with slow diffusion rates (<10$^{-14} m^{2} s^{-1}$). Comment: draft |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2004.06554 |
| رقم الأكسشن: | edsarx.2004.06554 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |