摘要
由于E°Pr(Ⅳ)/Pr(Ⅲ)高达3.2V,Pr(Ⅳ)化合物的制备远比Pr(Ⅲ)化合物困难。早期一般是在较苛刻的条件下,主要用干法或非水体系中制得。在水溶液中难以稳定存在。(E^eO2^+h^+/H_2O=+1.22V)。1980年D.E.Hobart曾报导在5.5M K_2CO_3-1M
Under a certain condition, the solid compounds of Pr(Ⅳ)(Ⅱ) basic car-bonatas have been prepared by chemical oxidation of potassium persulfata in aqueous solution. The oxidizing rate of Pr(Ⅱ) comes to 68.17 per cent. It has been characteristed by chemical analysis, UV, IR, thermal analysis and X-ray powder diffraction.
