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Issue 39, 2012
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Distribution of trivalent metal cations in alumino-/gallogermanate zeolites with JST topology

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Abstract

A series of zeolitic alumino- and gallogermanate compounds, |M(II)(en)3|[M(III)2Ge4O12] (M(II) = Ni, Co, Zn; M(III) = Al, Ga; en = ethylenediamine), has been synthesized using in situ formed [M(II)(en)3]2+ cations as the structure-directing agents. These zeolitic compounds exhibit the same JST framework topology which is built exclusively of 3-rings. Their structures were determined by single-crystal X-ray diffraction. The frameworks of these compounds are constructed from M(III)- and Ge-centred tetrahedra. According to inductively coupled plasma (ICP) analyses, the ratios of M(III)/Ge are 1/2 in all these compounds. The resulting negative charges in these frameworks are compensated by extra-framework [M(II)(en)3]2+ cations. Single crystal structural analyses show that there are two crystallographically distinct atom sites for M3+. According to the ICP results and the unique structural feature of JST, the most reasonable distribution of M3+ cations in these structures was deduced.

Graphical abstract: Distribution of trivalent metal cations in alumino-/gallogermanate zeolites with JST topology

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Publication details

The article was received on 02 Jun 2012, accepted on 05 Aug 2012 and first published on 07 Aug 2012


Article type: Paper
DOI: 10.1039/C2DT31185B
Citation: Dalton Trans., 2012,41, 12170-12174
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    Distribution of trivalent metal cations in alumino-/gallogermanate zeolites with JST topology

    Y. Xu, Y. Li, Y. Han, J. Yu and R. Xu, Dalton Trans., 2012, 41, 12170
    DOI: 10.1039/C2DT31185B

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