Ph.D. topic
Coordination Chemistry of early actinides with soft N-donor ligands
Tamara M. Duckworth
Prof. Dr.Thorsten Stumpf, Dr. Juliane März, PD Dr. Moritz Schmidt (HZDR)
Chemie der f-Elemente
01/2021-04/2024
Actinides, especially the transuranic elements such as neptunium and plutonium are far less studied compared to other metals of the periodic table. Therefore, to fill in some of the remaining gaps and to further expand the fundamental understanding of actinide bonding properties, we employed a range of different complexation ligands, mainly focusing on Schiff-base type ligands. Those ligand types, with mixed N,O donors have previously been studied in our group and by others.[1–3] This thesis is part of the f-char project, which takes a closer look at pure nitrogen donors to explore the coordination behavior, bonding and electronic properties of the early actinides in the tetravalent oxidation state. Specifically, we have been studying the tetravalent actinide compounds with different modifications of the Schiff base ligand pyren[4], a pure nitrogen equivalent of salen (N,N bis(salicylidene)ethylenediamine).
The obtained actinide complexes were investigated both in solid state by single crystal X-ray diffraction (SC-XRD) and high energy resolution fluorescence detected X-ray absorption near-edge structure (HERFD-XANES) and in solution by nuclear magnetic resonance spectroscopy (NMR) as well as computationally.
References
- T. Radoske, J. März, M. Patzschke, P. Kaden, O. Walter, M. Schmidt, T. Stumpf, Chem.– Eur. J. 2020, 26, 16853–16859.
- T. Radoske, R. Kloditz, S. Fichter, J. März, P. Kaden, M. Patzschke, M. Schmidt, T. Stumpf, O. Walter, A. Ikeda-Ohno, Dalton Trans. 2020, 49, 17559–17570.
- B. E. Klamm, C. J. Windorff, C. Celis-Barros, M. L. Marsh, D. S. Meeker, T. E. Albrecht-Schmitt, Inorg. Chem. 2018, 57, 15389–15398.
- L. Köhler, M. Patzschke, M. Schmidt, T. Stumpf, J. März, Chem. – Eur. J. 2021, 27, 18058–18065.
