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Issue 37, 2014
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Novel open-framework europium silicates prepared under high-temperature and high-pressure conditions

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Abstract

Two new europium silicates, Na15Eu3Si12O36 (denoted as 1) and K2EuSi4O10F (denoted as 2), were successfully synthesized under high-temperature and high-pressure conditions, and structurally characterized by single-crystal and powder X-ray diffraction (XRD). The single-crystal XRD analysis of 1 reveals that its structure is based on [Si6O18]n12n cyclosilicate anions that are built from six SiO4 tetrahedra sharing two of their four O corners with each other. Such [Si6O18]n12n cyclosilicate anions are linked via EuO6 octahedra to form a three-dimensional (3D) framework containing 6-membered ring channels delimited by the SiO4 tetrahedra and EuO6 octahedra along the [010] direction. The structure of 2 consists of infinite tubular chains of corner-sharing SiO4 tetrahedra, which are further linked together via corner sharing O atoms by infinite chains of EuO4F2 octahedra forming a 3-D framework that contains 8-ring and 6-ring channels along the [010] direction. The photoluminescence properties of 1 and 2 were also investigated.

Graphical abstract: Novel open-framework europium silicates prepared under high-temperature and high-pressure conditions

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Article information


Submitted
09 Jun 2014
Accepted
28 Jul 2014
First published
28 Jul 2014

Dalton Trans., 2014,43, 13892-13898
Article type
Paper
Author version available

Novel open-framework europium silicates prepared under high-temperature and high-pressure conditions

W. Liu, Y. Ji, X. Bao, Y. Wang, B. Li, X. Wang, X. Zhao, X. Liu and S. Feng, Dalton Trans., 2014, 43, 13892
DOI: 10.1039/C4DT01707B

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