摘要
由水热法合成了稀土苯甲酸盐配合物Ｌｎ（Ｃ６Ｈ５ＣＯＯ）３（Ｌｎ＝ Ｌａ，Ｎｄ，Ｓｍ ，Ｅｕ，Ｇｄ ，Ｄｙ ，Ｅｒ） 。用元素分析、ＩＲ、Ｘ射线粉末衍射表征了该系列配合物。它们都为层状结构， 属单斜晶系。用ＴＧ、ＤＴＡ、ＩＲ、色谱质谱联用仪研究了它们的热分解机制。在氮气氛下， 热分解分两步进行： 先分解生成二碳酸一氧盐和有机化合物； 而后二碳酸一氧盐进一步分解生成稀土氧化物和二氧化碳。第一步中生成的有机化合物成分比较复杂， 主要成分为二苯甲酮、９ ，１０蒽醌和１ ，３二苯基异苯并呋喃等。
The RE metal benzoates were synthesized by hydrothermal reaction. The complexes were characterized by elemental analysis, IR and X ray powder diffraction. They can be represented by general formula Ln(C 6H 5COO) 3(Ln=La, Nd, Sm, Eu, Gd, Dy and Er). All of them are monoclinic with layered structure. The mechanism of thermal decomposition of RE metal benzoates was studied by using TG, DTA, IR, and gas chromatography mass spectrometry. The thermal decomposition of the RE benzoates in nitrogen proceeds in two stages: firstly it decomposes to form RE 2O(CO 3) 2 and organic compounds, then RE 2O(CO 3) 2 decomposes further to form RE metal oxides and carbon dioxide. The organic compounds obtained from the first step of the reaction are mainly benzophenone, 9,10 anthraquinone, 1,3 Diphenylisobenzofuran and so on.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1999年第3期203-207,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金
关键词
稀土
苯甲酸盐
水热合成
热分解
络合物
Rare earths, Benzoate, Hydrothermal synthesis, Thermal decomposition
