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Synthesis and Characterization of CIT-13, a Germanosilicate Molecular Sieve with Extra-Large Pore Openings

Cited 50 time in Web of Science Cited 53 time in Scopus
Authors

Kang, Jong Hun; Xie, Dan; Zones, Stacey I.; Smeets, Stef; McCusker, Lynne B.; Davis, Mark E.

Issue Date
2016-09
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, Vol.28 No.17, pp.6250-6259
Abstract
The synthesis of the germanosilicate CIT-13, a molecular sieve that is the first to have a two-dimensional (2D) pore system possessing pores that are bounded by 14- and 10-rings, is accomplished using a family of monoquaternary, benzyl-imidazolium organic structure-directing agents (OSDAs) in aqueous media containing fluoride. CIT-13 is prepared using either hydrogen fluoride (HF) or ammonium fluoride (NH4F). The structure refinement suggests that most of the Ge atoms are located in the d4r(double-4-rings) units, and that there are framework disorders in the arrangement of those d4r units. Other characterizations of CIT-13 such as Si-29 MAS NMR spectra, Ar-adsorption isotherms, and so forth are presented and compared to those of IM-12 (UTL), a previously reported germanosilicate with 14- and 12-ring pores.
ISSN
0897-4756
URI
https://hdl.handle.net/10371/203382
DOI
https://doi.org/10.1021/acs.chemmater.6b02468
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