Scherrer Sarah K, Rajapaksha Harindu, Kravchuk Dmytro V, Mason Sara E, Forbes Tori Z
Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
Chem Commun (Camb). 2024 Sep 20;60(76):10584-10587. doi: 10.1039/d4cc03194f.
U(VI) peroxides are important within the nuclear fuel cycle, but reactive oxygen species (ROS) can form upon oxidation. Herein, we identified the spectral signatures of a U(VI) diperoxosuperoxide complex (KUPS-1) and observed that the transformation of U(VI) triperoxide (KUT-1) to superoxide forms occurred with trace-level Cr. U(VI) superoxide complexes were identified in EPR solution spectra without the use of spin-traps.
铀（VI）过氧化物在核燃料循环中很重要，但氧化时会形成活性氧物种（ROS）。在此，我们确定了一种铀（VI）双过氧超氧化物络合物（KUPS-1）的光谱特征，并观察到痕量铬会促使铀（VI）三过氧化物（KUT-1）向超氧化物形式转变。在不使用自旋捕获剂的情况下，在电子顺磁共振溶液光谱中鉴定出了铀（VI）超氧化物络合物。
