化学学报 ›› 2000, Vol. 58 ›› Issue (2): 144-148. 上一篇    下一篇

研究论文

苯甲酸钐的水热合成和热分解反应机理

张克立;袁继兵;袁良杰;孙聚堂   

  1. 武汉大学化学系.武汉(430072)
  • 发布日期:2000-02-15

Hydrothermal synthesis and thermal decomposition mechanism of samarium benzoate

Zhang Keli;Yuan Jibing;Yuan Liangjie;Sun Jutang   

  1. Wuhan Univ, Dept Chem.Wuhan(430072)
  • Published:2000-02-15

用水热法合成了无水苯甲酸钐配合物,经元素分析、IR和X射线粉末衍射表征了该配合物,系层状结构,属单斜晶系。用TG、DTA、IR、色谱-质谱联用仪研究了它的热分解机理。在氮气氛下,热分解分两步进行:第一步分解生成钐的二碳酸一氧盐和有机化合物。生成的有机化合物成分比较复杂,主要成分为苯甲酸、二苯甲酮、9,10-蒽醌和1,3-二苯基异苯并呋喃等。第二步二碳酸一氧盐进一步分解生成氧化钐和二氧化碳。

关键词: 苯甲酸P, 钐络合物, 水热合成, 热分解, 反应机理, 元素分析, 红外分光光度法, X射线衍射分析, 热重量分析, 差热分析

Samarium benzoate was synthesized through hydrothermal reaction. The complex was characterized by elemental analysis, IR and X-ray powder diffraction. It is monoclinic and has layered structure. The mechanism of thermal decomposition for samarium benzoate was studied by using TG, DTA, IR, and gas chromatography-mass spectroscopy. The thermal decomposition of samarium benzoate in nitrogen proceeded in two stages: first it decomposed to form Sm~2O(CO~3)~2 and organic compounds, then Sm~2O(CO~3)~2 decomposed further to form samarium oxide and carbon dioxide. The organic compounds obtained from the first step of the thermal decomposition reaction were mainly benzoic acid, benzophenone, 9, 10-anthraquinone, 13-diphenylisobenzofuran and so on.

Key words: BENZENECARBOXYLIC ACID P, SAMARIUM COMPLEX, HYDROTHERMAL METHOD, THERMAL DECOMPOSITION, REACTION MECHANISM, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, X-RAY DIFFRACTION ANALYSIS, THERMOGRAVIMETRY, DIFFERENTIAL THERMAL ANALYSIS

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