Synthesis, crystal structure solution and characterization of two organic-inorganic hybrid layered materials based on metal sulfates and 1,4-phenylenediamine

Two organic-inorganic hybrid layered materials, namely poly[(mu-1,4-diaminobenzene-kappa N-2:N')[mu(3)-sulfato(VI)-kappa 4O:O':O '',O''']manganese], [Mn(SO4)(C6H8N2)](n), 1, and poly[(mu-1,4-diaminobenzene-kappa N-2:N')[mu(3)-sulfato(VI)-kappa O-4:O':O '',O''']copper], [Cu(SO4)(C6H8N2)](n), 2, have been synthesized using 1,4-phenylenediamine (PPD) as an organic template and component (linker). Both materials form three-dimensional frameworks. The crystal structures were determined using data from powder X-ray diffraction measurements. The purity and morphology of the compounds were studied by elemental analyses and SEM investigations, and their thermal stabilities were determined by thermogravimetric and nonambient powder X-ray diffraction measurements, which indicated that 1 is stable up to 537 K and 2 is stable up to 437 K.