Hydrothermal synthesis and characterization of a new three-dimensional hybrid zinc phosphate [Zn-2(HPO4)(2)(4,4 '-bipy)]center dot 3H(2)O with neutral porous framework

摘要

Employing 4,4'-bipyridine as a bridged ligand, a new three-dimensional (3-D) hybrid zinc phosphate [Zn-2(HPO4)(2)(4,4'-bipy)] (.) 3H(2)O 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)angstrom, b = 10.229(2)angstrom, c = 9.0656(18)angstrom, beta = 90.21(3)degrees, V = 1964.8(7)angstrom(3) and Z = 4. The connectivity of the ZnO3N and HPO4 tetrahedra results in a 2-D neutral layer that with interesting 4,8(2) net along the bc plane. Furthermore, the 4,4'-bipyridine molecule links the 4,8(2) 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. (c) 2005 Elsevier Inc. All rights reserved.