A5040089827- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Radioactive element chemistry and processing
- Organometallic Complex Synthesis and Catalysis
- Coordination Chemistry and Organometallics
- Inorganic Chemistry and Materials
- Magnetism in coordination complexes
- Advanced NMR Techniques and Applications
- Radioactive contamination and transfer
- Material Properties and Applications
- Advanced Chemical Physics Studies
- Synthesis and Properties of Aromatic Compounds
- Nanocluster Synthesis and Applications
- Atomic and Subatomic Physics Research
- Organoboron and organosilicon chemistry
- Advanced Materials Characterization Techniques
- Fullerene Chemistry and Applications
- Nuclear Physics and Applications
- Lanthanide and Transition Metal Complexes
- Synthesis and characterization of novel inorganic/organometallic compounds
- History and advancements in chemistry
- Energetic Materials and Combustion
- Catalytic Processes in Materials Science
- Cultural Heritage Materials Analysis
Los Alamos National Laboratory
2021-2023
United States Naval Research Laboratory
2020
University of Maryland, College Park
2016-2019
K5Sb4 and K3Sb7 Zintl ion precursors react with Pd(PPh3)4 in ethylenediamine/toluene/PBu4+ solutions to give crystals of Sb@Pd12@Sb20n-/PBu4+ salts, where n = 3, 4. The clusters are structurally identical the two charge states, nearly perfect Ih point symmetry, can be viewed as an Sb@Pd12 icosahedron centered inside Sb20 dodecahedron. metric parameters suggest very weak Sb-Sb Pd-Pd interactions strong radial Sb-Pd bonds between Pd12 shells. All-electron DFT analysis shows 3- diamagnetic...
Abstract Covalency is often considered to be an influential factor in driving An 3+ vs. Ln selectivity invoked by soft donor ligands. This intensely debated, particularly the extent which /Ln covalency differences prevail and manifest as f‐block traversed, effects of periodic breaks beyond Pu. Herein, two Am complexes, [Am{N(E=PPh 2 ) } 3 ] ( 1‐Am , E=Se; 2‐Am E=O) are compared isoradial [Nd{N(E=PPh 1‐Nd 2‐Nd complexes. Covalent contributions assessed U/La Pu/Ce analogues. Through ab initio...
Reaction of a terphenyl bis(anilide) ligand with trivalent halide precursors Ce and early actinides yield both neutral “-ate” complexes. These molecules afford comparative insight into f-block metal–arene bonding.
Reaction of 3 equiv NaNR2 (R = SiMe3) with NpCl4(DME)2 in THF afforded the Np(IV) silylamide complex, [Np(NR2)3Cl] (1), good yield. 1 1.5 KC8 THF, presence dibenzo-18-crown-6, resulted formation [{K(DB-18-C-6)(THF)}3(μ3-Cl)][Np(NR2)3Cl]2 (4), also Complex 4 represents first structurally characterized Np(III) amide. Finally, reaction 5 and dibenzo-18-crown-6 bis(metallacycle), [{Na(DB-18-C-6)(Et2O)0.62(κ1-DME)0.38}2(μ-DME)][Np{N(R)(SiMe2CH2)}2(NR2)]2 (8), moderate 8 was by 1H NMR spectroscopy...
The combustion mechanism of [AlCp*]4 (Cp* = pentamethylcyclopentadienyl), a ligated aluminum(I) cluster, was studied by combination experimental and theoretical methods. Two complementary methods, temperature-programmed reaction T-jump time-of-flight mass spectrometry, were used to investigate the decomposition behaviors in both anaerobic oxidative environments, revealing AlCp* Al2OCp* be major products. observed product distribution pathways are consistent with prediction from molecular...
Reactions of K12Si17 with the low-valent transition-metal complex Mo(CO)3(C7H8) in ethylenediamine/toluene solutions presence 2,2,2-cryptand yield {Si(NHCH2CH2NH)3[Mo(CO)3]2}2– dianion, which contains an octahedral Si(NHCH2CH2NH)32– subunit. The SiN6 core comprises a rare example doubly deprotonated ethylenediame ligand coordination and is also first structurally characterized homoleptic Si(N∩N)3 trischelate. Its structure spectroscopic properties are described.
Abstract Covalency is often considered to be an influential factor in driving An 3+ vs. Ln selectivity invoked by soft donor ligands. This intensely debated, particularly the extent which /Ln covalency differences prevail and manifest as f‐block traversed, effects of periodic breaks beyond Pu. Herein, two Am complexes, [Am{N(E=PPh 2 ) } 3 ] ( 1‐Am , E=Se; 2‐Am E=O) are compared isoradial [Nd{N(E=PPh 1‐Nd 2‐Nd complexes. Covalent contributions assessed U/La Pu/Ce analogues. Through ab initio...
Abstract Two novel cyclic Al 3 clusters, Li 2 [Al (PR ) 6 ] ⋅ 2(Et O) [R=Ph ( 1 ), Cy )] were synthesized through salt metathesis of metastable AlCl (Et n solutions with LiPR . Both complexes characterized by single crystal X‐Ray diffraction and their solid state electronic structures are compared to previously reported clusters. Compounds further using density functional theory (DFT) methods understand the nature free electron three‐center two‐electron Al−Al bonds. Calculations revealed...
Until the last century iron gall ink (IGI) was by far most common used to pen many of important documents and drawings in human history.Despite such historical importance, there little known about composition, chemical properties structure iron-gallate complex Fe(C7H3+xO5)•nH2O -the main pigment IGI.The obstacle finding crystal amorphous nature IGI.However gallate can be also prepared crystalline form which then transforms amorphous.We present here five polymorph modifications IGI, all but...