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

被引:103
作者
Bon, Volodymyr [1 ]
Brunner, Eike [2 ]
Poeppl, Andreas [3 ]
Kaskel, Stefan [1 ]
机构
[1] Tech Univ Dresden, Fac Chem & Food Chem, Chair Inorgan Chem 1, Bergstr 66, D-01069 Dresden, Germany
[2] Tech Univ Dresden, Chair Bioanalyt Chem, Fac Chem & Food Chem, Bergstr 66, D-01069 Dresden, Germany
[3] Univ Leipzig, Inst Expt Phys 2, Linnestr 5, D-04103 Leipzig, Germany
基金
欧洲研究理事会;
关键词
electron paramagnetic resonance; in situ X-ray; neutron diffraction; metal-organic frameworks; nuclear magnetic resonance; transmission electron microscopy; METAL-ORGANIC FRAMEWORK; X-RAY-DIFFRACTION; ELECTRON-PARAMAGNETIC-RESONANCE; NUCLEAR-MAGNETIC-RESONANCE; STATE NMR-SPECTROSCOPY; HIGH-PRESSURE; POWDER DIFFRACTION; XE-129; NMR; METHANE STORAGE; CARBON-DIOXIDE;
D O I
10.1002/adfm.201907847
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
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页数:32
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