Issue 39, 2015

Organotemplate-free synthesis of two open-framework metal borophosphates

Abstract

Two new isostructural metal borophosphates, |K2(H2O)|[CoB2P3O12(OH)] [M = Co (1), Ni (2)], have been hydrothermally synthesized with non-polluting K+ ions instead of organic template-ethylenediamine. The two metal borophosphates are isostructural and constructed by the connection of tetrahedral layers and MO6 octahedra, giving rise to the 3-D intersecting 8-ring channels along the [010] direction. The negative charge of the framework is compensated by the K+ ions located in the 8-ring channels. Like ethylenediamine, the K+ ions also play an important structural directing role in the formation of the open framework. The framework shows a high thermal stability and is stable upon calcination at ca. 400 and 500 °C for 1 and 2, respectively. Considering the motion of K+ ions, ionic conductivities of the two compounds were performed. The results indicated that they have similar activation energies of 0.94–1.09 eV and conductivities of 6.76 × 10−8–9.88 × 10−8 S cm−1 at 320 °C.

Graphical abstract: Organotemplate-free synthesis of two open-framework metal borophosphates

Supplementary files

Article information

Article type
Paper
Submitted
12 Jul 2015
Accepted
20 Aug 2015
First published
26 Aug 2015

Dalton Trans., 2015,44, 17100-17105

Author version available

Organotemplate-free synthesis of two open-framework metal borophosphates

D. Zhang, Y. Feng, Y. Liu, Y. Zhang, G. Li and H. Yuan, Dalton Trans., 2015, 44, 17100 DOI: 10.1039/C5DT02637G

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