Syntheses, structures, ionic conductivities, and magnetic properties of three new transition-metal borophosphates Na5(H3O){M(II)3[B3O3(OH)]3(PO4)6}.2H2O (M(II) = Mn, Co, Ni)

Inorganic Chemistry
Miao YangRuren Xu

Abstract

Three new open-framework transition-metal borophosphates Na5(H3O){M(II)3[B3O3(OH)]3(PO4)6}.2H2O (M(II) = Mn, Co, Ni) (denoted as MBPO-CJ25) have been synthesized under mild hydrothermal conditions. Single-crystal X-ray diffraction analyses reveal that the three compounds possess isostructural three-dimensional (3D) open frameworks with one-dimensional 12-ring channels along the [001] direction. Notably, the structure can also be viewed as composed of metal phosphate layers [M(II)(PO4)2]4- with Kagomé topology, which are further connected by [B3O7(OH)] triborates, giving rise to a 3D open framework. The guest water molecules locate in the 12-ring channels. Partial Na+ ions reside in the 10-ring side pockets within the wall of the 12-ring channels, and the other Na+ ions and protonated water molecules locate in the 6-ring windows delimited by MO6 and PO4 polyhedra to compensate for the negative charges of the anionic framework. These compounds show a high thermal stability and are stable upon calcinations at ca. 500 degrees C. Ionic conductivities, due to the motion of Na+ ions, are measured for these three compounds. They have similar activation energies of 1.13-1.25 eV and conductivities of 2.7 x 10(-7)-9.9 x 10(-7) S cm(-1) at...Continue Reading

References

Nov 20, 1996·Inorganic Chemistry·Ranko P. Bontchev, Slavi C. Sevov
Feb 7, 2002·Journal of the American Chemical Society·Eddy DumasSlavi C Sevov
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Citations

Jan 1, 2008·Acta Crystallographica. Section E, Structure Reports Online·Zhi-Sheng LinRüdiger Kniep
Sep 16, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Dan ZhangHongming Yuan
Jul 16, 2008·Chemistry : a European Journal·Tao YangJianhua Lin
Sep 11, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Miao YangUrs Welz-Biermann
Feb 5, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Weiting YangRuren Xu

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