对甲基苯磺酸盐的合成与热重分析——碱土金属及过渡金属

合成了一系列碱土金属(Ca,Ba)和过渡金属(Fe,Mn,Co,Ni,Cu,Zn,Cd)对甲基苯磺酸盐,用热重分析仪在动态空气气氛下研究对甲基苯磺酸盐中结晶水个数和热分解产物,并探讨了其相对热稳定性。研究结果表明,除对甲基苯磺酸钙、对甲基苯磺酸钡和对甲基苯磺酸镉为无水盐外,其它对甲基苯磺酸盐都含有5或6个结晶水。碱土金属对甲基苯磺酸盐的最终热分解产物为金属硫酸盐,过渡金属对甲基苯磺酸盐的最终热分解产物为金属氧化物。并初步推断碱土金属和过渡金属对甲基苯磺酸盐的结构可能不同,但它们都具有较好的相对热稳定性。

Synthesis and Thermo-Gravimetric Analysis of p-Toluenesulfonates:Alkali Earth Metal and Transition Metal

A series of alkali earth metal(calcium,barium) and transition metal (iron,manganese,cobalt,nickel,copper,zinc,cadmium) p-toluenesulfonates were synthesized.The number of crystallization water molecules and the final thermal decomposition products of p-toluenesulfonates were determined by using thermo-gravimetric analyzer in dynamic air atmosphere,and the relative thermal stability was also discussed.The results show that all the p-toluenesulfonates,except anhydrous calcium,barium and chrome salts,containing five or six crystallization water molecules.The final thermal decomposition products of alkali earth ptoluenesulfonates are metallic sulphates,and those of transition metal p-toluenesulfonates are their corresponding metal oxides.It can be concluded that the structures of alkali earth metal and transition metal p-toluenesulfonates may be different.However,they all exhibit better relative thermal stability.