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PKU-20: A new silicogermanate constructed from sti and asv layers
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Peking University, China.
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Number of Authors: 10
2016 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 224, 384-391 p.Article in journal (Refereed) Published
Abstract [en]

A new silicogermanate (PKU-20) was hydrothermally synthesized using triethylisopropylammonium cation as the structure directing agent in the presence of fluoride. Its structure was determined from a combination of synchrotron single crystal X-ray diffraction and powder X-ray diffraction data. PKU-20 crystallizes in the monoclinic space group C2/m, with the lattice parameters of a = 18.5901(6) angstrom, b = 13.9118 (4) angstrom, c = 22.2614(7) angstrom and beta = 100.1514 (12)degrees. The framework of PKU-20 is constructed from an alternate stacking of sti and asv layers. The sti layer is exactly the same as that in the STI framework, while the asv layer is a new layer sliced off from the ASV framework parallel to the (112) plane. The takeout scheme of the layer is discussed on the basis of a composite building unit D4R-/au-D4R. PKU-20 possesses a two-dimensional channel system, where the 10-ring channels parallel to the [010] direction are intercrossed by 12-ring pockets along the [101] direction.

Place, publisher, year, edition, pages
2016. Vol. 224, 384-391 p.
Keyword [en]
PKU-20, STI framework, ASV framework, Silicogermanate, Hydrothermal synthesis
National Category
Chemical Sciences Nano Technology Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-129196DOI: 10.1016/j.micromeso.2015.12.052ISI: 000371841000046OAI: oai:DiVA.org:su-129196DiVA: diva2:935185
Available from: 2016-06-10 Created: 2016-04-17 Last updated: 2016-06-10Bibliographically approved

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Su, JieSun, Junliang
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