Synthesis, characterization and thermal properties of organic-inorganic hybrid layered materials based on metal sulfates and aromatic diamines: M(diamine)xSO4, (M = Fe, Co; x = 1, 2)

Abstract Five new compounds were synthesized by a solvent-free synthesis approach, based on cobalt and iron sulfates and 1,2-phenylenediamine (OPD), 1,3-phenylenediamine (MPD) and 1,4-phenylenediamine (PPD) as organic templates and linkers. Their dimensionalities and formulas are: 1D: Fe(OPD)2SO4(1); 2D: Fe(MPD)2SO4 (2), Co(MPD)2SO4 (3); 3D: Fe(PPD)SO4 (4) and Co(PPD)SO4 (5). The crystal structures were determined using data from X-ray powder diffraction measurements (XRPD). The purity and morphology of the compounds were studied by elemental analyses and SEM EDX investigations and their thermal stability was determined by thermogravimetric (TG) and temperature-dependent XRPD techniques.