title: (3,4)-connected zincophosphites as structural analogues of zinc hydrogen phosphate.
abstract: The synthesis and crystal structures of three new open-framework zincophosphites with helical channels are reported here in the context of the synthetic design of an open architecture from three- and four-connected polyhedral centers. These zincophosphites were prepared under hydrothermal conditions from HF-containing media in mixed water-ethylene glycol solvents. Their three-dimensional frameworks consist of alternating ZnO4(6-) tetrahedra and HPO3(2-) trigonal pyramids with an overall framework composition of [Zn3(HPO3)4]2-. The topology was analyzed by converting these zincophosphites from their (3,4)-connected network into a four-connected framework. The symmetry and charge density of three different structure-directing agents dictate the symmetry and framework density of resulting inorganic frameworks. These zincophosphites are structural analogues of a known hydrogen phosphate, suggesting that the bonding difference between -P-H and -P-OH plays an insignificant role in the formation of phosphite and hydrogen phosphate open frameworks.
authors.affiliation: Department of Chemistry and Biochemistry, California State University, Long Beach, California 90840, USA.
authors.forename: Lan
authors.initials: L
authors.lastname: Chen
authors.forename: Xianhui
authors.initials: X
authors.lastname: Bu
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D008958:Models, Molecular; D010710:Phosphates / Q000737:chemistry*; D017905:Phosphites / Q000138:chemical synthesis*; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D010710:Phosphates; D017905:Phosphites; D017967:Zinc Compounds; C043952:zinc phosphate