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本文用差热分析(DTA)、热重法(TG)、微商热重法(DTG)研究了十二种三价镧系金属离子与1,1,1,2,2,3,3七氟-7,7,二甲基-4,6辛二酮的络合物Ln(fod)_3·mH_2O的脱水过程和热分解过程的动力学。其脱水反应发生在100℃附近。络合物最大热分解速率的温度和热分解反应活化能均随中心金属原子——镧系元素原子序变化,呈现“双峰”现象。
In this paper, twelve kinds of trivalent lanthanide series metal ions and 1,1,1,2,2,3,3 heptanes were studied by differential thermal analysis (DTA), thermogravimetry (TG) and differential scanning calorimetry (DTG) Kinetics of dehydration and thermal decomposition of Ln (fod) _3 · mH_2O, the complex of fluoro-7,7-dimethyl-4,6-octanedione. The dehydration reaction occurs at around 100 ° C. The temperature of the maximum thermal decomposition rate of the complex and the activation energy of the thermal decomposition reaction both change with the atomic number of the central metal atom - lanthanide series, presenting a “bimodal” phenomenon.