Intergrown new zeolite beta polymorphs with interconnected 12-ring channels solved by combining electron crystallography and single-crystal X-ray diffraction
Cõrdova, Armando C.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Chemical Science Program
Imaging and Characterization Core Lab
Advanced Membranes and Porous Materials Research Center
Advanced Nanofabrication, Imaging and Characterization Core Lab
Nanostructured Functional Materials (NFM) laboratory
Permanent link to this recordhttp://hdl.handle.net/10754/562360
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AbstractTwo new polymorphs of zeolite beta, denoted as SU-78A and SU-78B, were synthesized by employing dicyclohexylammonium hydroxides as organic structure-directing agents. The structure was solved by combining transmission electron microscopy and single-crystal X-ray diffraction. SU-78 is an intergrowth of SU-78A and SU-78B and contains interconnected 12-ring channels in three directions. The two polymorphs are built from the same building layer, similar to that for the zeolite beta family. The layer stacking in SU-78, however, is different from those in zeolite beta polymorph A, B, and C, showing new zeolite framework topologies. SU-78 is thermally stable up to 600 °C. © 2012 American Chemical Society.
SponsorsThis work is supported financially by the Swedish Research Council (VR) and the Swedish Governmental Agency for Innovation Systems (VINNOVA) through the Berzelii Center EXSELENT, the Major State Basic Research Development Program of China (No. 2011CB932501), the National Natural Science Foundation of China (No. 20932004).
PublisherAmerican Chemical Society (ACS)
JournalChemistry of Materials