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

A novel cobalt borophosphate, (NH 4) 2(C 4H 12N 2)[Co 2B 4P 6O 24(OH) 2]·H 2O with the mixed cations has been synthesized under mild hydrothermal conditions. Its crystal structure was determined by the single-crystal X-ray diffraction (tetragonal, I4 1/ a (no. 88), a=14.207(3) Å, c=24.956(6) Å, V=5037.09(2) Å 3, 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) [B 2P 3O 14(OH)]. The CoO 6 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. A new organically-templated cobalt borophosphate, (NH 4) 2(C 4H 12N 2)[Co 2B 4P 6O 24(OH) 2]·H 2O with a novel borophosphate 3D anionic partial framework has been synthesized under mild hydrothermal conditions. [Display omitted] ► 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.