A5047480025- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Lanthanide and Transition Metal Complexes
- Radioactive element chemistry and processing
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetism in coordination complexes
- Polyoxometalates: Synthesis and Applications
- Concrete Corrosion and Durability
- Catalysis and Oxidation Reactions
- Ionic liquids properties and applications
- Geochemistry and Elemental Analysis
- Chemical and Physical Properties in Aqueous Solutions
- Corrosion Behavior and Inhibition
- Chemical Synthesis and Characterization
- Advanced Battery Materials and Technologies
- Analytical Chemistry and Chromatography
- Molecular Junctions and Nanostructures
- History and advancements in chemistry
- Crystallography and molecular interactions
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Polymer Nanocomposite Synthesis and Irradiation
- Carbon Dioxide Capture Technologies
- Surfactants and Colloidal Systems
- Vanadium and Halogenation Chemistry
Oregon State University
2018-2024
Battelle
2023-2024
Pacific Northwest National Laboratory
2021-2024
University of California, Merced
2015
Instituto de Investigaciones Químicas y Ambientales de Barcelona
2008
Consejo Superior de Investigaciones Científicas
2008
Abstract Spectator ions have known and emerging roles in aqueous metal‐cation chemistry, respectively directing solubility, speciation, reactivity. Here, we isolate structurally characterize the last two metastable members of alkali uranyl triperoxide series, Rb + Cs salts (Cs‐ U 1 Rb‐ ). We document their rapid solution polymerization via small‐angle X‐ray scattering, which is compared to more stable Li , Na K analogues. To understand role alkalis, also quantify alkali‐hydroxide promoted...
The physicochemical properties of aluminum trifluoromethanesulfonate in diglyme have been investigated. spectroscopic and electrochemical examined to determine speciation, conductivity, stability. Gaussian calculations provide optimized molecular geometries offer insight into the behavior solutions. ions solution appear exhibit very straightforward behavior, with contact ion pairs forming at low concentrations. In addition, window electrolyte initially decreases increasing salt concentration...
Group V Nb-polyoxometalate (Nb-POM) chemistry generally lacks the elegant pH-controlled speciation exhibited by group VI (Mo, W) POM chemistry. Here three Nb-POM clusters were isolated and structurally characterized; [Nb14 O40 (O2 )2 H3 ]14- , [((UO2 )(H2 O))3 Nb46 (UO2 O136 H8 (H2 O)4 ]24- [(Nb7 O22 H2 )4 )7 O)6 ]22- that effectively capture aqueous species from pH 7 to 10. These Nb-POMs illustrate a reaction pathway for control over is driven counter-cations (Li+ ) rather than pH. The two...
A novel actinide-containing coordination polymer, [Am(C2O4)(H2O)3Cl] (Am-1), has been synthesized and structurally characterized. The crystallographic analysis reveals that the structure is two-dimensional comprised of pseudo-dimeric Am3+ nodes are bridged by oxalate ligands to form sheets. Each metal center nine-coordinate, forming a distorted capped square antiprism geometry with C1 symmetry, features bound oxalate, aqua, chloro ligands. Am3+-ligand bonds were probed computationally using...
Uranyl-peroxide capsules are the newest family of polyoxometalates. Although discovered 13 years previously with over 70 topologies reported, there is a lack in fundamental understanding assembly mechanisms, particularly role alkali counterions. Herein, reaction pathway and uranyl peroxide reported by tracking conversion from K+ triperoxide monomer to uranyl-peroxide U28 capsule means small-angle X-ray scattering Raman spectroscopy. For first time, pentamer face isolated structurally...
Uranyl peroxide capsules are a fascinating class of polyoxometalates (POMs), discovered only in the 21st century. Understanding reactivity between peroxide, alkali cations, and uranyl alkaline solutions is important nuclear science disciplines including mineralogy, energy, legacy wastes. Here, we have developed general procedure to isolate different fragments uranyl-peroxide POM capsules, using organic solvents partially remove K+ salts from crude solids monomer building block UO2(O2)34-...
The uranyl triperoxide anionic monomer is a fundamental building block for peroxide polyoxometalate capsules. reaction pathway from the to capsule can be greatly altered by counterion: both rate and resulting structure. We synthesized characterized triperoxides Mg2UO2(O2)3·13H2O (MgUT), Ca2UO2(O2)3·9H2O (CaUT), Sr2UO2(O2)3·9H2O (SrUT), K4UO2(O2)3·3H2O (KUT) compared their thermodynamic stabilities. enthalpies of formation oxides elements these compounds were calculated thermochemical cycles...
Aqueous solutions of lithium uranyl triperoxide, Li4[UO2(O2)3] (LiUT), were irradiated with gamma rays at room temperature and found to form the peroxide cage cluster, Li24[(UO2)(O2)(OH)]24 (Li-U24). Raman spectroscopy 18O labeling used identify Raman-active vibrations LiUT. With these assignments, concentration LiUT was tracked as a function radiation dose. A discrepancy between monomer removal cluster formation suggests that reaction proceeds by assembly an intermediate. Non-negative...
We report the structural, vibrational, and optical properties of americium formate (Am(CHO
Nuclear double duty? When coupled with heavy alkali counter-cations, depleted uranium (from nuclear fuel production) in the form of a uranyl triperoxide is potent material for CO2 direct air capture (DAC). In their Research Article (DOI: 10.1002/chem.202301687), M. Nyman and co-workers show how they isolated highly reactive Cs+ Rb+ materials reactivity analogues increases increasing size, through polymerization solution DAC solid state.
Differences in synthetic conditions and structural systematics a series of actinide–oxo clusters reflect trends the hydrolysis behavior tetravalent metal ions, Th–Pu.
Lanthanide-containing materials are of interest in the field crystal engineering because their unique properties and distinct structure types. In this context, a new samarium–sodium heterometallic coordination polymer, poly[tetrakis(μ 2 -2-formyl-6-methoxyphenolato)samarium(III)sodium(I)], {[SmNa(C 8 H 7 O 3 ) 4 ]·solvent} n ( Sm-1 ), was synthesized crystallized via slow evaporation from mixture ethanol acetonitrile. The compound features alternating Sm III Na I ions, which linked by ortho...
Herein we report the synthesis and structural characterization of three new europium containing coordination polymers: [Eu(terpy)(2,6-ndc) 1.5 ]·H 2 O (Linus Pauling (LP) 1), [Eu(terpy)(1,4-ndc)(1,4-Hndc)] ( LP- 2), [Eu(phen)(2,6-ndc) ]·DMF 3).
Reported is the synthesis, crystal structure, and solid-state characterization of a new americium containing metal-organic framework (MOF), [Am(C9H3O6)(H2O)], MOF-76(Am). This material constructed from Am3+ metal centers 1,3,5-tricarboxylic acid (BTC) ligands, forming porous three-dimensional that isostructural with several known trivalent lanthanide (Ln) analogs (e.g., Ce, Nd, Sm-Lu). The ions have seven coordinates assume distorted, capped trigonal prismatic geometry C1 symmetry. Am3+-O...