Syntheses and characterization of two new zinc phosphites with 1D chains decorated by Zn-centered complexes

Two inorganic-organic hybrid solids, Zn2(phen)(HPO3)2 (1) and Zn(phen)(HPO3) (2), have been synthesized under solvothermal conditions in the presence of 1,10-phenanthroline (phen) ligands. Their structures were determined by single-crystal X-ray diffraction and further characterized by FTIR, elemental analysis, powder X-ray diffraction, thermogravimetric analysis and fluorescent spectra. Compound 1 crystallizes in the triclnic system, space group P-1, a=8.1813(3)A, b=8.5535(3)A, c=12.3031(5)A, α=75.609(1)o, β=79.145(2)o, γ=67.157(2)o, V=764.46(5)A3, Z=2. Compound 2 is monoclinic, C2/c, a=16.1044(7)A, b=18.9447(6)A, c=8.1713(6)A, β=94.175(4)o, V=2486.4(2)A3, Z=8. Both structures consist of 1D chains constructed from strictly alternating ZnO4 and HPO3 polyhedra through sharing vertices. The chains are further decorated by Zn-centered complex architectures, [Zn(phen)]2+ for 1 and [Zn(phen)2]2+ for 2. The 2D and 3D supramolecular arrays for 1 and 2 are stably stacked via strong π-π interactions of the phen groups, respectively