Hydrothermal synthesis and characterization of a new three-dimensional hybrid zinc phosphate [Zn2(HPO4)2(4,4′-bipy)]·3H2O with neutral porous framework

Employing 4,4′-bipyridine as a bridged ligand, a new three-dimensional (3-D) hybrid zinc phosphate [Zn2(HPO4)2(4,4′-bipy)]·3H2O has been prepared under hydrothermal conditions and characterized by single crystal X-ray diffraction. This compound crystallizes in the monoclinic space group C2/c  , with cell parameters, a=21.188(4)Å, b=10.229(2)Å, c=9.0656(18)Å, β=90.21(3)°β=90.21(3)°, V=1964.8(7)Å3 and Z=4Z=4. The connectivity of the ZnO3N and HPO4 tetrahedra results in a 2-D neutral layer that with interesting 4,82 net along the bc plane. Furthermore, the 4,4′-bipyridine molecule links the 4,82 net into a 3-D structure. The water molecules sit in the middle of the channels and interact with the framework via hydrogen bonds. The compound exhibits intense photoluminescence at room temperature.

Graphical abstractView of the two-dimensional neutral zinc phosphate layer along the bc plane.Figure optionsDownload full-size imageDownload as PowerPoint slide