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Solvothermal Reaction of Rare-Earth Metals in 2-Methoxyethanol and 2-Aminoethanol

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In a previous paper, we reported that the reaction of cerium metal in 2-methoxyethanol yielded a transparent colloidal solution of ultrafine (2 nm) ceria particles [M. Inoue, M. Kimura, T. Inui, Chem. Commun., 957 (1999)]. In this paper, the solvothermal reaction of other rare-earth metals in 2-methoxyethanol has been examined. Reactions of Sm and Yb metals in 2-methoxyethanol at 300°C yielded transparent colloidal solutions of Sm2O3 and Yb2O3 particles. However, the reaction of rare-earth metals of Y, Eu, Gd, and Tb in 2-methoxyethanol at 300°C resulted in recovery of the starting materials. Transparent colloidal solutions of the oxides of these elements were obtained by reaction in the presence of a small amount of acetic acid. The solvothermal reaction of rare-earth metals in 2-aminoethanol was also examined.

Document Type: Research Article


Affiliations: Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan

Publication date: April 1, 2006

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