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7.92 g of manganese chloride tetrahydrate (MnCl2•4H2O, 40 mmol, Aldrich Chemical Co., 98 %) and 24.36 g of sodium oleate (80 mmol, TCI Co., 95 %) were added to a mixture composed of 30 ml of ethanol, 40 ml of distilled water, and 70 ml of n-hexane. The resulting mixture solution was heated to 70 ¡ãC and maintained overnight at this
temperature. The solution was then transferred to a separatory funnel and the upper organic layer containing the Mn-oleate complex was washed several times using
distilled water. The evaporation of the hexane solvent produced a pink coloured Mn-oleate powder.
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