Actinide covalency measured by pulsed electron paramagnetic resonance spectroscopy
| Autor: | Fabrizio Ortu, Andrew Kerridge, Eric J. L. McInnes, Ana-Maria Ariciu, Floriana Tuna, David P. Mills, Alasdair Formanuik, Reece Beekmeyer |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Pulsed EPR General Chemical Engineering Thorium chemistry.chemical_element General Chemistry Actinide 010402 general chemistry 01 natural sciences Spectral line 0104 chemical sciences Nuclear magnetic resonance chemistry Chemical bond Chemical physics Reactivity (chemistry) Spectroscopy Hyperfine structure |
| Zdroj: | Formanuik, A, Ariciu, A-M, Ortu, F, Beekmeyer, R, Kerridge, A, Tuna, F, Mcinnes, E & Mills, D 2016, ' Actinide covalency measured by pulsed electron paramagnetic resonance spectroscopy ', Nature Chemistry, vol. 9, pp. 578-583 . https://doi.org/10.1038/nchem.2692 |
| DOI: | 10.1038/nchem.2692 |
| Popis: | Our knowledge of actinide chemical bonds lags far behind our understanding of the bonding regimes of any other series of elements. This is a major issue given the technological as well as fundamental importance of f-block elements. Some key chemical differences between actinides and lanthanides-and between different actinides-can be ascribed to minor differences in covalency, that is, the degree to which electrons are shared between the f-block element and coordinated ligands. Yet there are almost no direct measures of such covalency for actinides. Here we report the first pulsed electron paramagnetic resonance spectra of actinide compounds. We apply the hyperfine sublevel correlation technique to quantify the electron-spin density at ligand nuclei (via the weak hyperfine interactions) in molecular thorium(III) and uranium(III) species and therefore the extent of covalency. Such information will be important in developing our understanding of the chemical bonding, and therefore the reactivity, of actinides. |
| Databáze: | OpenAIRE |
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