Unraveling Structure and Dynamics in Porous Frameworks via Advanced In Situ Characterization Techniques,Advanced Functional Materials

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Unraveling Structure and Dynamics in Porous Frameworks via Advanced In Situ Characterization Techniques
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-01-28 , DOI: 10.1002/adfm.201907847
Volodymyr Bon ₁ , Eike Brunner ₂ , Andreas Pöppl ₃ , Stefan Kaskel ₁

Affiliation

Dynamic metal–organic frameworks (MOFs) represent a subgroup of frameworks featuring unique performance, as they are capable of adapting their pore size and/or the orientation of framework constituents in response to specific guest molecules such as gases or solutes and often outperform their rigid analogus in gas storage, sensing, or separation. In this review, the authors focus on recent methodical developments of advanced in situ diffraction and spectroscopic techniques for comprehensive characterization of porous frameworks. Examples for advanced instrumentation are highlighted for in situ nuclear magnetic resonance, electron paramagnetic resonance, and optical spectroscopies as well as X‐ray and neutron diffraction. Several examples of high‐resolution transmission electron microscopy (HRTEM) on MOFs are shown because HRTEM is an emerging technique for the characterization of time‐resolved structural dynamics in MOFs. These methods shed light on structural features and phase transitions of the host, its spin state, electronic structure, specific host–guest and guest–guest interactions, preferable adsorption sites, and bonding situation in the framework, focusing on the most prominent recent case studies. The synergistic development of novel in situ characterization methods and exploration of well‐defined model framework systems are crucial to advance the understanding of dynamic processes in porous materials in future.

中文翻译：

通过先进的原位表征技术揭示多孔框架中的结构和动力学

动态金属-有机骨架（MOF）代表具有独特性能的骨架的一个子集，因为它们能够适应特定的客体分子（例如气体或溶质）来适应其孔径和/或骨架成分的取向，并且通常胜过其刚性类似于储气，感测或分离。在这篇综述中，作者关注于先进的原位衍射和光谱技术对多孔骨架的全面表征的最新方法学发展。重点介绍了用于现场核磁共振，电子顺磁共振，光谱学以及X射线和中子衍射的先进仪器实例。展示了MOF的高分辨率透射电子显微镜（HRTEM）的几个示例，因为HRTEM是表征MOF中时间分辨结构动力学的新兴技术。这些方法阐明了主体的结构特征和相变，自旋状态，电子结构，特定的主客体和客客体相互作用，优选的吸附位点以及框架中的键合情况，重点是最近最著名的案例研究。新颖的原位表征方法的协同发展和对定义明确的模型框架系统的探索对于将来对多孔材料动力学过程的理解至关重要。这些方法阐明了主体的结构特征和相变，自旋状态，电子结构，特定的主客体相互作用和客客体相互作用，优选的吸附位点以及框架中的键合情况，重点是最近最著名的案例研究。新颖的原位表征方法的协同发展和对定义明确的模型框架系统的探索对于将来对多孔材料动力学过程的理解至关重要。这些方法阐明了主体的结构特征和相变，自旋状态，电子结构，特定的主客体和客客体相互作用，优选的吸附位点以及框架中的键合情况，重点是最近最著名的案例研究。新颖的原位表征方法的协同发展和对定义明确的模型框架系统的探索对于将来对多孔材料动力学过程的理解至关重要。

更新日期：2020-01-28

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