A new organically-templated cobalt borophosphate with a novel borophosphatic anionic partial structure

A novel cobalt borophosphate, (NH4)2(C4H12N2)[Co2B4P6O24(OH)2]·H2O with the mixed cations has been synthesized under mild hydrothermal conditions. Its crystal structure was determined by the single-crystal X-ray diffraction (tetragonal, I41/a (no. 88), a=14.207(3) Å, c=24.956(6) Å, V=5037.09(2) Å3, Z=8). The crystal structure consists of a new type of three-dimensional borophosphatic anionic partial framework, which is built from the condensation of the fundamental building unit (FBU) [B2P3O14(OH)]. The CoO6 octahedra are enchased in such borophosphate network to form a complex open framework with a three-dimensional intersecting channel system, the voids of which are occupied by ammonium, dipronated piperazine ions and water molecules, respectively. The magnetic measurement of the title compound has also been investigated.

Graphical abstractA new organically-templated cobalt borophosphate, (NH4)2(C4H12N2)[Co2B4P6O24(OH)2]·H2O with a novel borophosphate 3D anionic partial framework has been synthesized under mild hydrothermal conditions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The first cobalt borophosphate with the 3D anionic partial borophosphate network. ► A porous framework with an intersecting three-dimensional channel system. ► The borophosphate compound with the mixed cations.