Synthesis and Structure of a 22 x 12 x 12 Extra-Large Pore Zeolite ITQ-56 Determined by 3D Electron Diffraction

Kapaca, Elina (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Jiang, Jiuxing (author)

Cho, Jung (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Jordá, José L. (author)

Díaz-Cabañas, María J. (author)

Zou, Xiaodong (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Corma, Avelino (author)

Willhammar, Tom (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

(creator_code:org_t)

2021-06-02
2021
English.
In: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 143:23, s. 8713-8719

Related links:: https://doi.org/10.1...; show more...; https://pubs.acs.org...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

A multidimensional extra-large pore germanosilicate, denoted ITQ-56, has been synthesized by using modified memantine as an organic structure-directing agent. ITQ-56 crystallizes as plate-like nanocrystals. Its structure was determined by 3D electron diffraction/MicroED. The structure of ITQ-56 contains extra-large 22-ring channels intersecting with straight 12-ring channels. ITQ-56 is the first zeolite with 22-ring pores, which is a result of ordered vacancies of double 4-ring (d4r) units in a fully connected zeolite framework. The framework density is as low as 12.4 T atoms/1000 angstrom(3). The discovery of the ITQ-56 structure not only fills the missing member of extra-large pore zeolite with 22-ring channels but also creates a new approach of making extra-large pore zeolites by introducing ordered vacancies in zeolite frameworks.

By the author/editor: Kapaca, Elina; Jiang, Jiuxing; Cho, Jung; Jordá, José L.; Díaz-Cabañas, Ma ...; Zou, Xiaodong; show more...; Corma, Avelino; Willhammar, Tom; show less...

About the subject

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