NMR Study of the Host Structure and Guest Dynamics Investigated with Alkane/Alkene Mixtures in Metal Organic Frameworks ZIF-8,The Journal of Physical Chemistry C

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NMR Study of the Host Structure and Guest Dynamics Investigated with Alkane/Alkene Mixtures in Metal Organic Frameworks ZIF-8
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-01-11 , DOI: 10.1021/acs.jpcc.8b11673
Dieter Freude ₁ , Nina Dvoyashkina ₁ , Sergei S. Arzumanov _{2,

3} , Daniil I. Kolokolov _{2,

3} , Alexander G. Stepanov _{2,

3} , Christian Chmelik ₁ , Hua Jin ₄ , Yanshuo Li ₄ , Jörg Kärger ₁ , Jürgen Haase ₁

Affiliation

Within the family of metal–organic frameworks, the zeolite–imidazolate framework (ZIF) of type ZIF-8 is among the most promising materials with potential application for hydrocarbon separation, notably of alkanes and alkenes. We have applied NMR spectroscopy for exploring the interaction of representative alkane/alkene mixtures with the host framework as well as the mobility of the various components in their mixture. Deviating from, for example, the separation patterns known for MFI-based membranes, the mobility of the faster molecules (alkenes) is found to remain essentially unaffected by the presence of more slowly diffusing molecules (alkanes). In addition, ²H and ⁶⁷Zn magic-angle spinning NMR contributes to the characterization of ZIF-8 in search for guest-induced changes in the lattice structure.

中文翻译：

在金属有机骨架ZIF-8中用烷烃/烯烃混合物研究主体结构和客体动力学的NMR研究

在金属-有机骨架家族中，ZIF-8型沸石-咪唑骨架（ZIF）是最有前途的材料之一，可用于烃分离，尤其是烷烃和烯烃的分离。我们已应用NMR光谱研究了具有代表性的烷烃/烯烃混合物与主体骨架的相互作用以及混合物中各种组分的迁移率。不同于例如基于MFI的膜的已知分离模式，发现较快的分子（烯烃）的迁移率基本上不受较慢扩散的分子（烷烃）的存在的影响。另外² H和⁶⁷Zn魔角旋转NMR有助于ZIF-8的表征，以寻找客体诱导的晶格结构变化。

更新日期：2019-01-13

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