X-ray absorption L-III and M-V edges of hexavalent lower actinide

X-ray absorption spectroscopy is used to probe the electronic and structural features of the actinides. To better understand the effect of the effective charge and polyhedron on the edge structure, we discuss the L-m and M-v edges in AnO(2)(NO3)(2)(TBP)(2) (where the actinide is shortly linked to the 'yl' oxygens) and in the perovskite Ba(2)ZnAnO(6) (where the hexavalent actinide is in the cubic structure as An(6+)), An = U, Np, Pu. Using FEFF8 simulations, both features and position of the L-m and M-v edges are explained within a crystal field splitting of the orbitals picture and a multiple scattering picture

Electronic Structure of High Oxidation State Actinide Species: Theoretical and Experimental Approaches

RADIOCHEarly actinides (u, Np, Pu, Am) show a particular linear bond actinyl-type structure in their highest oxidation state.The multiple-bond nature of this chemical pattern contributes to a drastic diminution of the charge on the metallic core inducing a strong stabilization of these high oxidation states. The potential participation of the early actinide 5f orbitals in the valence molecular shell is supposed to be one of the most important engines of the chemical specificity. In order to progress in the comprehension of the behavior, a study of the electronic and the geometric structures of some actinyl complexes with different electronic configurations is undertaken using theoretical and experimental approaches

Electronic Structure of High Oxidation State Actinide Species: Theoretical and Experimental Approaches

RADIOCHEarly actinides (u, Np, Pu, Am) show a particular linear bond actinyl-type structure in their highest oxidation state.The multiple-bond nature of this chemical pattern contributes to a drastic diminution of the charge on the metallic core inducing a strong stabilization of these high oxidation states. The potential participation of the early actinide 5f orbitals in the valence molecular shell is supposed to be one of the most important engines of the chemical specificity. In order to progress in the comprehension of the behavior, a study of the electronic and the geometric structures of some actinyl complexes with different electronic configurations is undertaken using theoretical and experimental approaches

Electronic Structure of High Oxidation State Actinide Species - Theoretical and Experimental Approaches

Early actinides (U, Np, Pu, Am) show a particular linear bond actinyl-type structure in their highest oxidation state. The multiple-bond nature of this chemical pattern contributes to a drastic diminution of the charge on the metallic core inducing a strong stabilization of these high oxidation states. The potential participation of the early actinide 5f orbitals in the valence molecular shell is supposed to be one of the most important engines of this chemical specificity. In order to progress in the comprehension of this behavior, a study of the electronic and the geometric structures of some actinyl complexes with different electronic configurations is undertaken using theoretical and experimental approaches.JRC.E.6-Actinides researc