A5007888401- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Radioactive element chemistry and processing
- Chemical Thermodynamics and Molecular Structure
- Nuclear Materials and Properties
- Nuclear materials and radiation effects
- Thermal and Kinetic Analysis
- Lanthanide and Transition Metal Complexes
- Crystallography and molecular interactions
- Catalysis and Oxidation Reactions
- Crystal structures of chemical compounds
- History and advancements in chemistry
Georgetown University
2018-2024
Organic ligands with carboxylate functionalities have been shown to affect the solubility, speciation, and overall chemical behavior of tetravalent metal ions. While many reports focused on actinide complexation by relatively simple monocarboxylates such as amino acids, in this work we examined Th(IV) U(IV) 4-hydroxybenzoic acid water aim understanding impact that organic backbone has solution solid state structural chemistry thorium(IV) uranium(IV) complexes. Two compounds general formula...
A series of eighteen tetravalent actinide (An = Th, U, Pu) compounds were synthesized from acidic aqueous solutions containing thorium, uranium, or plutonium and a protonated nitrogen heterocycles. The characterized using Raman, IR, optical absorption spectroscopies. structures determined single-crystal X-ray diffraction found to consist [An(H2O)xCly]4–y (x 4–7 y 2–4) AnCl62– molecular units. Breaks in the structural chemistry early actinides observed, with Th adopting exclusively...
Uranium(IV) complexation by 2-furoic acid (2-FA) was examined to better understand the effects of ligand identity and reaction conditions on species formation stability. Five compounds were isolated: [UCl2 (2-FA)2 (H2 O)2 ]n (1), [U4 Cl10 O2 (THF)6 ]⋅2 THF (2), [U6 O4 (OH)4 O)3 (2-FA)12 ]⋅7 THF⋅H2 O (3), ]⋅8.76 H2 (4), [U38 Cl42 O54 (OH)2 O)20 ]⋅m O⋅n (5). The structures determined single-crystal X-ray diffraction further characterized Raman, IR, optical absorption spectroscopy. thermal...
Differences in synthetic conditions and structural systematics a series of actinide–oxo clusters reflect trends the hydrolysis behavior tetravalent metal ions, Th–Pu.
Aqueous reactions of thorium chloride and furanmono‐ dicarboxylate ligands including 2‐furoate (2FA), 3‐furoate (3FA), 2,5‐furandicarboxylate (2,5FDC) yielded four Th(IV) phases that exhibit diverse structural chemistry ranging from isolated molecular units to 3D topologies. [Th(2FA) 4 ] n ( Th‐1 ) [Th(3FA) Th‐2 consist isostructural ligand bridged 1D chains. The compounds wide stability, forming at temperatures 20–120 °C pH ca. 1–4. Using the bifunctional 2,5FDC a stark difference is...