固体~ 2 H NMR研究正丁烷和1-丁烯在ZIF-8中的动力学
Dynamics of Butane and 1-Butene in ZIF-8 Probed by Solid-State 2H NMR
摘要：
我们提出了一个详细的$^{2}$ H NMR表征1-丁烯和正丁烷通过微孔ZIF-8，一个沸石咪唑骨架的分子迁移率，其出色的高稳定性和分离选择性的各种著名。正丁烷和1-丁烯在ZIF-8中的扩散系数的实验表征的分子尺度上提供的第一次。通过$^{2}$ H NMR自旋弛豫分析，我们阐明了1-丁烯和正丁烷客体在ZIF-8骨架中的运动机制，并推导了每种运动类型的动力学参数。正丁烷和1-丁烯扩散系数的微观平移扩散和活化势垒（E $_{C4H10}$ = 34 kJ mol $^{-1}$，E $_{C4H8}$ = 32 kJ mol $^{-1}$）的特征时间已被阐明。最后，我们表明，$^{2}$ H NMR技术能够提供可靠的信息，微观扩散率在ZIF-8的MOF，即使是扩散速率慢的分子（<10 $^{-14} m^{2} s^{-1}$）。
英文摘要：
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$^{-14} m^{2} s^{-1}$).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
