Synthesis, structure, spectroscopic properties, and thermal analyses of a manganese(II) complex containing oxalate, azide anion, and 1,10-phenanthroline

One new metal-organic framework [Mn(N3)(ox)0.5(phen)] n · 2H2O (1) (ox = oxalate, = azido anion, phen = 1,10-phenanthroline) has been prepared and isolated under hydrothermal conditions. The complex has been fully characterized by elemental analysis, IR, UV-spectrum, TGA, and single-crystal X-ray diffraction. In 1 the Mn2+ ions are linked by bridging azides and ox groups to form the zigzag Mn–(N3)–Mn–ox–Mn. Zigzag chains in two directions generate a 2-D supramolecular network, stabilized by π–π interactions between the phen ligands. IR spectra suggest that azido is an end-on bridging ligand. The thermal analysis confirms the high stability of the material, due to the infinite metal–N3–metal–ox–metal arrays.