Electron crystallography is an important technique for structure characterization of novel porous materials.1 Crystals millions times smaller than what is needed for X-ray diffraction can be studied. Recently we have developed a new method, rotation electron diffraction (RED) for collection and processing of 3D electron diffraction (ED) data.2 More than 1000 ED frames can be collected from an arbitrarily oriented crystal in less than an hour. The unit cell, possible space groups and ED intensities can be obtained. The 3D ED methods have shown to be very powerful and efficient for structure determination of various porous materials including zeolites, metal-organic frameworks, and covalent organic frameworks (Fig.1).2-8 We will show how RED data initiated the development of a novel approach that combines structure solution with structure prediction, and inspires subsequent targeted synthesis of new super-complex zeolites. Finally we demonstrate the combination of RED and electron tomography for studying mesostructured zeolite structures (Fig.2).9 References (1)Willhammar,T.; Yun,Y.; Zou,X.; Adv. Funct. Mater. 2014,24, 82. (2)Wan,W.; Sun,J.; Zou,X.et al. J. App. Crystallogr. 2013, 1863. (3)Martínez-Franco,R.; Zou,X.; Corma,A.et al. PNAS, 2013, 110, 3749. (4)Willhammar,T.; Burton,A.W.et al., JACS 2014, 136, 13570. (5)Hua,W.; Chen, H.; Sun, J.et al., Angew Chem. Int. Ed. 2014, 53, 5868. (6)Jiang,J.; Yun,Y.; Zou,X.; Corma,A.et al., Chem. Sci.. 2015, 6, 480. (7)Feng,D.; Su,J.; Zou,X.; Zhou,H.-C.et al., Nature Comm. 2015, 6: 5979. (8)Zhang,Y.; Su,J.; Zou,X.; Yaghi,O.et al., JACS 2013, 135, 16336. (9)Garcia-Martinez,J.; Xiao,C.et al. ChemCatChem. 2014, 6, 3110.

Electron crystallography as an important technique for discovery of novel porous materials

250th National Meeting (2015)

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