| Abstract: | The rare earth metal benzoates were synthesized using hydrothermal reaction. The complexes were characterized by elemental analysis, IR and X-ray powder diffraction. They can be represented by general formula RE(C6H5COO)3(RE=La, Nd, Sm, Eu, Gd, Dy and Er). All of them are monoclinic and have layered structure. Themechanism of thermal decomposition of rare earth metal benzoates was studied by using TG, DTA, IR, and gas chromatography-mass spectromtry. The thermal decomposition of the rare earth benzoates in nitrogen proceeded in twostages; firsily it decomposed to form RE2O (CO3)2 and organic compounds, then RE2O (CO3)2 decomposed further toform rare earth metal oxides and carbon dioxide. The organic compounds obtained from the first step of the reaction aremaiuly benzophenone, 9, 10-anthraquinone, 1, 3-Diphenylisobenzofuran and so on. |
