Characteristics of thermal decomposition products of rare earth, alkali earth metal and transition metal<Emphasis Type=”Italic”> p</Emphasis>-toluenesulfonates

Summary

A series of alkali earth (Ca, Ba), lanthanide (La, Ce, Pr, Nd,) and transition metal (Fe, Mn, Co, Ni, Cu, Zn, Cd) <Emphasis Type=”Italic”>p</Emphasis>-toluenesulfonates were synthesized. Thermal analysis, infrared spectrophotometry, and XRD powder diffraction patterns were employed to characterize the final thermal decomposition products. By heating in dynamic air atmosphere at 30-850&deg;C, it has been found that the alkali earth p-toluenesulfonates thermal decompose ending with sulphates CaSO<Subscript>4</Subscript> and BaSO<Subscript>4</Subscript>, while the lanthanide <Emphasis Type=”Italic”>p</Emphasis>-toluenesulfonates with oxosulphates (LaO)<Subscript>2</Subscript>SO<Subscript>4</Subscript>, (PrO)<Subscript>2</Subscript>SO<Subscript>4</Subscript>, (NdO)<Subscript>2</Subscript>SO<Subscript>4</Subscript> and CeO<Subscript>2</Subscript>. Only the transition metal <Emphasis Type=”Italic”>p</Emphasis>-toluenesulfonates, decompose ending with appropriate metal oxides in all cases.