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Open-framework germanates formed by the flexible Ge10 cluster
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
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2008 (English)In: Zeolites and related materials: Trends, targets and challenges: Proceedings of the 4th International FEZA Conference, Vol. 174, Part A / [ed] Antoine Gédéon, Pascale Massiani and Florence Babonneau, Amsterdam: Elsevier, 2008, 317-320 p.Conference paper, Published paper (Refereed)
Abstract [en]

Open-framework germanates have shown promising results in achieving extra-large pores and channels. Pores that extend to the mesoporous range (>20Å) were reported in SU-M. The structure of SU-M is built by the Ge10X28 (Ge10, X = O, OH, F) clusters. This cluster is also found in Ge-pharmacosiderite, Na4Ge9O20, ICMM-7 and SU-61. The Ge10 cluster has a flexibility to form compounds with both high and very low framework densities.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2008. 317-320 p.
Series
Studies in surface science and catalysis, ISSN 0167-2991
Keyword [en]
Open-framework germanate, Ge10 cluster, coordination, crystal structure
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-24861DOI: 10.1016/S0167-2991(08)80206-6ISBN: 978-0-444-53297-8 (print)OAI: oai:DiVA.org:su-24861DiVA: diva2:198433
Conference
Paris, France, 2-6 September 2008
Available from: 2008-04-24 Created: 2008-04-24 Last updated: 2012-03-08Bibliographically approved
In thesis
1. Open-Framework Germanates: Crystallography, structures and cluster building units
Open this publication in new window or tab >>Open-Framework Germanates: Crystallography, structures and cluster building units
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is focussing on the crystallographic challenges and what knowledge we can gain from studying the different open-framework germanates. Five new open-framework germanates have been synthesized and the structures have been determined by single crystal X-ray diffraction. A thorough description is made of the different problems raised with the different compounds, whether it is choice of crystal system in SU-61, twinning and possible ordering in SU-46, superstructure and variation in elemental content in SU-57, template disorder in JLG-5 or framework disorder in SU-44.

Open-framework germanates are often built from one type of cluster, such as the Ge7 [Ge7X19], Ge8 [Ge8X20], Ge9 [Ge9Xn, n =25-26] and Ge10 [Ge10X28], (X =O, OH, F) clusters. The structures built by clusters containing different kinds of polyhedra are discussed, with a focus on the 4-coordinated Ge7 clusters, the larger cluster aggregate found in SU-8 and SU-44 and the structures built by the Ge10 clusters.

Place, publisher, year, edition, pages
Stockholm: Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi, 2008. 90 p.
Keyword
germanate, crystallography, building unit, zeotype, scale chemistry
National Category
Chemical Sciences
Research subject
Structural Chemistry
Identifiers
urn:nbn:se:su:diva-7501 (URN)978-91-7155-570-0 (ISBN)
Public defence
2008-05-16, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 10:00
Opponent
Supervisors
Available from: 2008-04-24 Created: 2008-04-24Bibliographically approved

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