A5080970045- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Heusler alloys: electronic and magnetic properties
- Crystallography and molecular interactions
- Nanocluster Synthesis and Applications
- Advanced Thermoelectric Materials and Devices
- Iron-based superconductors research
- Electrocatalysts for Energy Conversion
- Magnetism in coordination complexes
- Organometallic Complex Synthesis and Catalysis
- Metalloenzymes and iron-sulfur proteins
- Metal-Catalyzed Oxygenation Mechanisms
- Chalcogenide Semiconductor Thin Films
- Peptidase Inhibition and Analysis
- Molecular Sensors and Ion Detection
- Superconductivity in MgB2 and Alloys
- CO2 Reduction Techniques and Catalysts
- Thermodynamic and Structural Properties of Metals and Alloys
- Inorganic Chemistry and Materials
- Supramolecular Self-Assembly in Materials
- Lanthanide and Transition Metal Complexes
- Metal complexes synthesis and properties
- Electronic and Structural Properties of Oxides
- Intermetallics and Advanced Alloy Properties
- Corporate Taxation and Avoidance
Johannes Gutenberg University Mainz
2011-2016
University of Nevada, Reno
2012-2015
University of Applied Sciences Mainz
2014
Sc-doping of ZrNiSn Half-Heusler materials provides useful insight into why the n-type compounds possess such excellent thermoelectric properties.
Phase separated half-Heusler compounds and the application of an average effective mass model to optimize carrier concentration.
The trigonally coordinated [AuCu(PPh(2)py)(3)](BF(4))(2) (1) crystallizes in two polymorphs and a pseudopolymorph, each of which contains cation with short Au(I)-Cu(I) separations ∼2.7 Å. Under UV illumination, these crystals luminesce different colors ranging from blue to yellow. structures cations are nearly superimposable, the primary difference resides relative placement anions solvate molecules. As confirmed by time-dependent density functional theory calculations, it is interactions...
Nickel-containing superoxide dismutase (NiSOD) is a mononuclear cysteinate-ligated nickel metalloenzyme that catalyzes the disproportionation of into dioxygen and hydrogen peroxide by cycling between NiII NiIII oxidation states. All ligating residues to are found within first six from N-terminus, which has prompted several research groups generate NiSOD metallopeptide-based mimics derived sequence. To assess viability using these (NiSOD maquettes) probe mechanism SOD catalysis facilitated...
Four crystalline dimers of the type, Au(I)(2)(μ-PnP)(2)I(2), where PnP is PPh(2)(CH(2))(n)PPh(2) with n = 3, 4, 5, and 6 have been prepared characterized by single-crystal X-ray diffraction (31)P NMR infrared spectroscopy. Au(I)(2)(μ-P3P)(2)I(2) Au(I)(2)(μ-P6P)(2)I(2) are centrosymmetric planar Au(I)P(2)I units oriented in antiparallel fashion. Remarkably, noncentrosymmetric Au(I)(2)(μ-P5P)(2)I(2) has its parallel manner. Au(I)(2)(μ-P4P)(2)(μ-I)(2) unique, since it contains four-coordinate...
Copper doping of FeSe destroys its superconductivity at ambient pressure, even low levels. Here we report the pressure-dependent transport and structural properties Fe${}_{1.01\ensuremath{-}x}$Cu${}_{x}$Se with 3$%$ 4$%$ Cu find that is restored. Metallic resistivity behavior, absent in Cu-doped FeSe, also At pressure 1.5 GPa, seen 6 K for doping, somewhat lower than 8 ${T}_{c}$ undoped FeSe. reaches maximum 31.3 7.8 superconducting temperature material under (${T}_{c}$ max 37 K) but still...
The ternary superconductor NaAlSi, isostructural with LiFeAs, the ``111'' iron pnictide superconductor, is investigated under pressure. structure remains stable up to 15 GPa. Resistivity and susceptibility measurements show an increase of ${T}_{c}$ 2 GPa, followed by a decrease until superconductivity disappears at 4.8 Band calculations that pressure should have negligible effect on electronic Fermi surface thus disappearance must different origin. We compare NaAlSi nonsuperconducting NaAlGe.
Cobalt nitrile hydratases (Co-NHase) contain a catalytic cobalt(III) ion coordinated in an N2S3 first coordination sphere composed of two amidate nitrogens and three cysteine-derived sulfur donors: thiolate (-SR), sulfenate (-S(R)O–), sulfinate (-S(R)O2–). The sequence biosynthetic reactions that leads to the post-translational oxidations metal ligands is unknown, but process believed be initiated directly by oxygen. Herein we utilize cobalt bound N2S2 seven amino acid peptide known as SODA...
Copper coordination to soluble oligomers of the English (AβH(6)R) mutant amyloid-β peptide is probed. Cu(II) yields a square planar (N/O)4 environment, while reduction an O2 inert linear bis-His Cu(I) centre.
Nickel-containing superoxide dismutases (NiSODs) are bacterial metalloenzymes that catalyze the disproportionation of O2(-). These enzymes take advantage a redox-active nickel cofactor, which cycles between Ni(II) and Ni(III) oxidation states, to catalytically disprotorptionate The center is ligated in square planar N2S2 coordination environment, which, upon Ni(III), becomes five-coordinate following ligation an axial imidazole ligand. Previous studies have suggested metallopeptide-based...
The colorless, two-coordinate gold(i) complex, [(H2O)3Na][Au(SCSN3)2], has been synthesized through the [2 + 3] cyclic reaction of carbon disulfide and sodium azide in presence labile complex (tht)AuCl. Metathesis with tetra(phenyl)arsonium chloride produced colorless needles (Ph4As)[Au(SCSN3)2]. structure [(H2O)3Na][Au(SCSN3)2] involves linear gold coordination by two exocyclic sulfur atoms 1,2,3,4-thiatriazole-5-thiolate anions. These anions self-associate to form extended, zig-zag chains...