Synthesis and structure of the first protonated zincoborophosphate:: (H3O)Zn(H2O)2BP2O8•H2O

The solid acid of the first protonated zincoborophosphate, (H3O)Zn(H2O)(2)(BP2O8H2O)-H-. (1), was soventothermally synthesized by the reaction of Zn (NO3)(2)(.)6H(2)O and H3BO3 with H3PO4 in a mixed solvent, and structurally characterized by single-crystal X-ray diffraction analysis. It crystallizes in the hexagonal P6(1)22, a 0.9604 (4) nm, c = 1.5297 (6) nm, V = 1.2218(8) nm(3), D-c = 2.921 g/cm(3), Z = 6, F (000) = 1080, mu = 3.495 mm(-1). The structure features that the tetrahedra-tetrahedra helices interconnected by octahedra and strong hydrogen bond interactions form a three-dimensional framework. The protonated water molecules are located at unique positions. Other characterizations by IR and thermal analysis are also described.