Electronic absorption spectra of uranium (IV) chlorides in some organic solvents and fused chlorides

Investigation of the Electronic Structure of Mono(1,1′-Diamidoferrocene) Uranium(IV) Complexes

“…Spectra of organoactinide complexes show, in the UV–vis region, interconfigurational f → d transitions,which are allowed and thus give rise to intense absorption bands at high energy, and absorption bands originating from charge transfer between the actinide and its ligands. Like f → d transitions, charge transfer bands are observed at high energy but are typically more intense. − Moreover, the energy of charge transfer bands is affected by both the nature of the ligand and the oxidation state of the metal, as well as the distance between them . In addition, absorption bands for the compounds discussed herein may also originate from electronic transitions based on the iron center, as well as their interaction with amido substituents or uranium.…”

“…Like f→d transitions, charge transfer bands are observed at high energy but are typically more intense. [50][51][52][53] Moreover, the energy of charge transfer bands is affected by both the nature of the ligand and the oxidation state of the metal, as well as the distance between them. 49 In addition, absorption bands for the compounds discussed herein may also originate from electronic transitions based on the iron center, as well as their interaction with amido substituents or uranium.…”

Pulse radiolysis study on the reactivity of NO3˙ radical toward uranous(iv), hydrazinium nitrate and hydroxyl ammonium nitrate at room temperature and at 45 °C

“…These spectra exhibit the characteristic absorption band of U(IV) centered at 647 nm. [86][87][88][89][90][91][92] ). 93 The U(IV) solution is stable at least for a few hours during our experiments (Figure 1 Right).…”