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PKU-21: A Novel Layered Germanate Built from Ge-7 and Ge-10 Clusters for CO2 Separation
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Beihang University, China; Peking University.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0001-9800-3370
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 52017 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 23, no 71, p. 17879-17884Article in journal (Refereed) Published
Abstract [en]

The attractive properties of layered inorganic materials, which make them suitable for numerous applications in chemical industries and life sciences, originated from their crystalline framework structures. Here, we report a new layered germanate PKU-21, which was prepared by the hydrothermal synthesis method using 2-propanolamine (MIPA) as the structure-directing agent. The structure of PKU-21 was determined from synchrotron single-crystal X-ray diffraction and synchrotron powder X-ray diffraction data. It reveals a complicated framework structure containing 18 unique Ge atoms in the asymmetric unit. PKU-21 is the first layered germanate built from both Ge-7 and Ge-10 clusters, following the 3-dimensional germanate PKU-17. The preparation and structure of PKU-21 are discussed in comparison with PKU-17, which provides new insight into the formation mechanism of germanates. Gas sorption experiments indicate that the layered PKU-21 sample exhibits a better CO2 sorption selectivity over N-2 and CH4 at 298K than at 273K, making it a promising candidate for CO2 separation.

Place, publisher, year, edition, pages
2017. Vol. 23, no 71, p. 17879-17884
Keywords [en]
cluster compounds, CO2 separation, germanium, layered germanates, structure elucidation
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-152500DOI: 10.1002/chem.201704573ISI: 000418356700007PubMedID: 29119606OAI: oai:DiVA.org:su-152500DiVA, id: diva2:1181041
Available from: 2018-02-07 Created: 2018-02-07 Last updated: 2018-02-07Bibliographically approved

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