A5045582390- Polyoxometalates: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Crystallization and Solubility Studies
- Organometallic Compounds Synthesis and Characterization
- Inorganic Chemistry and Materials
- Metalloenzymes and iron-sulfur proteins
- Magnetism in coordination complexes
- Nanocluster Synthesis and Applications
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Crystal Structures and Properties
- Inorganic Fluorides and Related Compounds
- Solid-state spectroscopy and crystallography
- Particle physics theoretical and experimental studies
- Crystallography and molecular interactions
- Quantum Chromodynamics and Particle Interactions
- Chemical Synthesis and Characterization
- Synthesis and characterization of novel inorganic/organometallic compounds
- Chemical Thermodynamics and Molecular Structure
- Advanced Chemical Physics Studies
- Inorganic and Organometallic Chemistry
- Vanadium and Halogenation Chemistry
- Crystal structures of chemical compounds
- Lanthanide and Transition Metal Complexes
Ramboll (Germany)
2017-2020
Eyesense (Germany)
2020
Bielefeld University
2009-2019
Kurt-Schwabe-Institut für Mess- und Sensortechnik Meinsberg
2019
University of Regensburg
2019
Martin Luther University Halle-Wittenberg
2017-2019
University of Applied Sciences Kaiserslautern
2017-2018
RWTH Aachen University
1993-2015
University of Applied Sciences Worms
2015
University of Würzburg
2003-2014
Abstract Inorganic metal–oxygen cluster anions form a class of compounds that is unique in its topological and electronic versatility important several disciplines. Names such as Berzelius , Werner Pauling appear the early literature field. These clusters (so‐called isopoly‐ heteropolyanions) contain highly symmetrical core assemblies MO x units (M = V, Mo, W) often adopt quasi‐spherical structures based on Archimedean Platonic solids considerable interest. Understanding driving force for...
Abstract In their highest oxidation states the early transition metals V, Nb, Ta, Mo, W, and Re form tetrahedral, strongly colored thioanions endowed with some remarkable properties. Thiometalates can be formed by solid‐state reactions or in solution from oxometalates. Poly‐thiometalates mixed valences produced new types of intramolecular condensation‐redox thioanions. The metal‐sulfur bonds react either nucleophilically electrophilically, case Mo–S this is biochemical interest. It important...
Abstract Die Verbindungsklasse der Metall‐Sauerstoff‐Clusteranionen ist nicht nur einzigartig hinsichtlich ihrer topologischen und elektronischen Vielfalt — sie hat auch erhebliche Bedeutung für ganz unterschiedliche Disziplinen. So sind die früheren Arbeiten auf diesem Forschungsgebiet mit Namen wie Berzelius, Werner Pauling verbunden. Derartige Cluster (man nennt üblicherweise Isopoly‐ Heteropolyanionen) enthalten häufig hochsymmetrische, oft angenähert kugelförmige Anordnungen von MO x...
Abstract A key reaction in the biological and material world is controlled linking of simple (molecular) building blocks, a with which one can create mesoscopic structures, which, for example, contain cavities display specifically desired properties, but also compounds that exhibit typical solid‐state structures. The best example this context chemistry host–guest interactions, spans entire range from three‐ two‐dimensional to one‐ “zero‐dimensional”, discrete host Members class...
Molybdenum monsters: A huge molybdenum cluster, comprising large areas with different local symmetry (in the picture colors represent (smaller) Mo fragments) is prepared and characterized. Molybdate fragments, which can tolerate a change of electron density at various positions, be linked in tremendous variety ways according to split-and-link process. Small changes boundary conditions, especially redox control growth, as well H+ ion concentration, have deciding influence on
Pythagorean harmony can be found in the spherical polyoxometalate clusters described here (see illustration for an example of a structure), since there are interesting relationships between so-called magic numbers (12, 32, 42, 72, 132) relevant viruses and number building blocks cluster. The size these Keplerate tailored by varying type connections pentagons means different spacers.
The earlier tremendous interest in molybdenum blue solutions-an enigma for generations of chemists-became even more pronounced when it turned out that the basic building units correspond to giant wheel-shaped clusters with nanostructured cavities, displaying exceptional aesthetic beauty. This discovery will stimulate new ideas supramolecular chemistry, colloid and materials science. wheels represent nanosensors nanoreactors, enabling initiation chemical processes at different positions, like...
The conducting interface of ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ heterostructures has been studied by hard x-ray photoelectron spectroscopy. From the Ti $2p$ signal and its angle dependence we derive that thickness electron gas is much smaller than probing depth 4 nm carrier densities vary with increasing number ${\mathrm{LaAlO}}_{3}$ overlayers. Our results point to an electronic reconstruction in overlayer as driving mechanism for corroborate recent interpretation superconducting...
Self-assembly has proven a powerful means of preparing structurally intricate nanomaterials, but the mechanism is often masked by common one-pot mixing procedure. We employed flow system to study steps underlying assembly previously characterized molybdenum oxide wheel 3.6 nanometers in diameter. observed crystallization an intermediate structure which central {Mo36} cluster appears template surrounding {Mo150} wheel. The transient nature demonstrated its ejection after reduced final...
Abstract With wide-field phased array feed technology, the Australian Square Kilometre Array Pathfinder (ASKAP) is ideally suited to search for seemingly rare radio transient sources that are difficult discover previous-generation narrow-field telescopes. The Commensal Real-time ASKAP Fast Transient (CRAFT) Survey Science Project has developed instrumentation continuously fast transients (duration ≲ 1 second) with ASKAP, a particular focus on finding and localising Radio Bursts (FRBs). Since...
Plato and Kepler would have been pleased. Despite the large number of atoms present cluster anion 1 resembles an icosahedral-type structure. This represents definitively unprecedented event in chemistry! The structure is made up 12 {Mo11} fragments such that fivefold symmetry axes are retained resulting spherical object. As inscribed icosahedron can be recognized shell (see picture), similarities with Kepler's famous model cosmos seen.
Complex clusters the size of small proteins can be generated in reduced molybdate solutions by linking defined fragments. An example this is giant cluster (NH 4 ) 25±5 [Mo 154 (NO) 14 O 420 (OH) 28 (H 2 O) 70 ]·ca. 350 H with a molar mass more than 30000 gmol −1 , anion which shaped like tire nanodimensional cavity 20 Å diameter and has an extremely large inner outer surface as well number mobile electrons.
In polyoxometalate chemistry a large variety of compounds, clusters and solid-state structures can be formed by linking together metal–oxygen building blocks. Interestingly, reactions based on libraries virtual blocks planned under appropriate conditions, resulting for instance in the high-yield synthesis inorganic superfullerenes giant ring-shaped, electron-rich, mixed-valence polyoxomolybdates with nanosized cavities. The latter species continue to grow also covalently linked form chains...