Structural and Spectroscopic Investigation of Two Plutonium Mellitates
| Autor: | Joseph M. Sperling, Alexander T. Chemey, Megan A. Whitefoot, Joanna G Campbell, Bonnie E. Klamm, Thomas E. Albrecht-Schmitt, Brian N. Long, Alyssa N. Gaiser, Cory J. Windorff |
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| Rok vydání: | 2020 |
| Předmět: |
Lanthanide
Ionic radius 010405 organic chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences 0104 chemical sciences Plutonium Inorganic Chemistry Metal Bond length chemistry.chemical_compound Cerium chemistry visual_art visual_art.visual_art_medium Lanthanum Physical chemistry Mellitic acid Physical and Theoretical Chemistry |
| Zdroj: | Inorganic Chemistry. 59:3085-3090 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.9b03432 |
| Popis: | The aqueous reaction of mellitic acid (H6mell) with 242PuBr3·nH2O forms two plutonium mellitates, 242Pu2(mell)(H2O)9·H2O (Pu-1α) and 242Pu2(mell)(H2O)8·2H2O (Pu-1β). These compounds are compared to the isomorphous lanthanide mellitates with similar ionic radii via bond length analysis. Both plutonium compounds form three-dimensional metal-organic frameworks, with Pu-1α having two unique metal centers and Pu-1β having one. All plutonium metal centers exhibit nine-coordinate geometries. Our results show metal-oxygen bond lengths for plutonium significantly shorter than those of the previously reported lanthanum and herein reported cerium analogues, consistent with the nine-coordinate ionic radii. Clear Laporte-forbidden 5f → 5f transitions are observed in the ultraviolet-visible-near-infrared spectra and are assigned to trivalent plutonium. However, there is a distinct color difference between the two plutonium compounds. |
| Databáze: | OpenAIRE |
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