An open-framework silicogermanate regularly constructed from natrolite zeolite chains and Ge9O18(OH)4 clusters?

Dalton Transactions Pub Date: 2018-11-12 DOI: 10.1039/C8DT04175J

Abstract

Here we describe the synthesis and structure of PST-18, a novel open-framework silicogermanate with Si/Ge ～ 0.6, which contains a three-dimensional pore system consisting of large cuboid-shaped cavities with 8-ring windows, as well as with 7-rings interrupted by one OH group. Synchrotron single-crystal X-ray diffraction reveals that the structure of PST-18, synthesized using only tetramethylammonium fluoride as a structure-directing agent, is built up of natrolite zeolite chains and Ge9O18(OH)4 clusters in a fully ordered manner. The discovery of such a hybrid structure of zeolitic building units and non-zeolitic oxide clusters provides a new direction for expanding the structural regime of inorganic microporous crystalline materials.

Graphical abstract: An open-framework silicogermanate regularly constructed from natrolite zeolite chains and Ge9O18(OH)4 clusters
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