Photochemical Reactions of Pentakis(N,N-dimethylformamide)dioxouranium(VI) Ions in Nonaqueous Solutions
Photochemical Reactions of Pentakis(N,N-dimethylformamide)dioxouranium(VI) Ions in Nonaqueous Solutions
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非水溶液中五(N,N-二甲基甲酰胺)二氧铀(VI)离子的光化学反应
DOI：
10.1246/bcsj.59.2387
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发表时间：
1986
影响因子：
4
通讯作者：
T. Kojima
中科院分区：
文献类型：
--
作者：
H. Fukutomi;T. Harazono;T. Kojima
研究了[UO2(dmf)5]2+ （dmf=N，N-二甲基甲酰胺）离子在dmf和丙酮溶液中的光化学反应。[UO2(dmf)5]2+在初始阶段光解产物为U(V)， U(V)在无酸有机溶剂中非常稳定，在dmf中很容易得到U(V)的吸收光谱。在755 nm处测得U(V)的摩尔消光系数为45.5±1.5 M−1 cm−1 （M=mol dm−3）。U(V)的形成似乎是通过分子内反应（ki）进行的，通过激光闪光光解确定了ki的下限约为107 s−1。
Photochemical reactions of [UO2(dmf)5]2+ (dmf=N,N-dimethylformamide) ions were investigated in DMF and acetone solutions. The photolysis product of [UO2(dmf)5]2+ at the initial stage was U(V), which was so stable in acid-free organic solvents in the dark that the absorption spectrum of U(V) was easily obtained in DMF. The molar extinction coefficient of U(V) was determined to be 45.5±1.5 M−1 cm−1 (M=mol dm−3) at 755 nm. The formation of U(V) seems to proceed through the intramolecular reaction (ki) and the lower limit of ki was determined to be about 107 s−1 from the lifetime of excited uranyl ions by using a laser flash photolysis.