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Issue 17, 2012
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Three low-dimensional open-germanates based on the 44 net

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Abstract

Three novel low-dimensional open-germanates, denoted as SU-71, SU-72 and SU-73, were synthesized by solvothermal methods and their structures were determined by single crystal X-ray diffraction. The structures of SU-71, SU-72 and SU-73 are all built from Ge7X19 (X = O, OH or F) clusters that are connected according to the topologies related to the 44 net. SU-71 has a layered structure following the 44 net, SU-72 contains 2D slabs with unprecedented crescent-shaped 23-ring channels and SU-73 consists of zero-dimensional (0D) open nanoballs. SU-71 and SU-72 were both synthesized using 1-(2-aminoethyl)piperazine (AEP) as the organic structure directing agent, while pentaethylenehexamine (PEHA) was used for the synthesis of SU-73. All three phases form in the presence of HF, which promotes the formation of the Ge7X19 cluster. A comparison of the related structures reveals a relationship between the orientation of the Ge7X19 building units and the curvature of the 44 net layer.

Graphical abstract: Three low-dimensional open-germanates based on the 44 net

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Article information


Submitted
01 May 2012
Accepted
12 Jun 2012
First published
13 Jun 2012

CrystEngComm, 2012,14, 5465-5471
Article type
Paper

Three low-dimensional open-germanates based on the 44 net

A. K. Inge, J. Sun, F. Moraga, B. Guo and X. Zou, CrystEngComm, 2012, 14, 5465
DOI: 10.1039/C2CE25665G

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