Synthesis and characterization of a new organically templated zincophosphate: (C2N2H10)2[Zn(PO4)2]

A new open-framework zincophosphate, (C2N2H10)2[Zn(PO4)2], has been synthesized hydrothermally from a mixture of zinc chloride, phosphoric acid, ethylenediamine and deionized water. It has the following crystal data: orthorhombic space group Pccn, a = 17.056(3) Å, b = 8.4219(17) Å, c = 8.7260(18) Å, V = 1253.4(4) Å3, Z = 4. The crystal structure of the title compound is characterized by corner-sharing PO4 and ZnO4 tetrahedra, leading to infinite corner-shared four-membered ring chains. There is extensive Zn-O-P bonding in the structure in the form of infinite chains. The structure is stabilized by template-to-framework hydrogen bonding. The title compound was also characterized by IR spectroscopy and TG-DTA. Luminescent measurement of (C2N2H10)2[Zn(PO4)2] shows an emission band between 665 nm and 688 nm when excited with 451 nm UV light.