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以中压汞灯为光源，采用吸收光谱法，观察了UO2（NO3）2·6H2O在DMF（N，N－二甲基甲酰胺）溶剂中光化还原时的吸收光谱随照射时间、铀浓度及溶液酸度的变化，经短时间光照后，在UO2（NO3）2－DMF溶液中有铀（Ⅴ）形成，其吸收峰在755和635nm处，结果表明，它们分别是UO－DMF和UOOH2＋－DMF的特征吸收，溶液中铀（Ⅴ）的岐化反应与H＋浓度密切相关，UOOH2＋是岐化反应的中间体。
The absorption spectra of UO2 (NO3) 2 · 6H2O in DMF (N, N-dimethylformamide) were observed by absorption spectroscopy with medium pressure mercury lamp as the light source. The absorption spectra of UO2 And the acidity of the solution. Uranium (Ⅴ) was formed in UO2 (NO3) 2-DMF solution after a short period of illumination and its absorption peak was at 755 and 635 nm. The results showed that they were UO-DMF and UOOH2 + DMF characteristic absorption, the solution of uranium (Ⅴ) disproportionation reaction is closely related to the concentration of H +, UOOH2 + is the disproportionation reaction intermediates.