- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Inorganic Chemistry and Materials
- Crystal Structures and Properties
- Crystallography and molecular interactions
- Organometallic Compounds Synthesis and Characterization
- Synthesis and characterization of novel inorganic/organometallic compounds
- Organometallic Complex Synthesis and Catalysis
- Nanocluster Synthesis and Applications
- Magnetism in coordination complexes
- Iron-based superconductors research
- Polyoxometalates: Synthesis and Applications
- Inorganic Fluorides and Related Compounds
- Metal complexes synthesis and properties
- Lanthanide and Transition Metal Complexes
- Solid-state spectroscopy and crystallography
- Chalcogenide Semiconductor Thin Films
- Metal-Organic Frameworks: Synthesis and Applications
- Coordination Chemistry and Organometallics
- Chemical Synthesis and Characterization
- Quantum Dots Synthesis And Properties
- Crystal structures of chemical compounds
- Glass properties and applications
- Radioactive element chemistry and processing
- Advanced Battery Materials and Technologies
Karlsruhe Institute of Technology
2004-2025
Institute of Nanotechnology
2023-2024
Philipps University of Marburg
2014-2023
Robert Bosch (Germany)
2023
Philips (Germany)
2022
The Ohio State University
2016
Physical Sciences (United States)
2016
Bausch Health (Germany)
2014
Paul Pascal Research Center
2011
Centre National de la Recherche Scientifique
2005-2011
The reaction of Li2S and P2S5 with Li4[SnS4], a recently discovered, good Li(+) ion conductor, yields Li10SnP2S12, the thiostannate analogue record holder Li10GeP2S12 second compound this class superionic conductors very high values 7 mS/cm for grain conductivity 4 total at 27 °C. replacement Ge by Sn should reduce raw material cost factor ~3.
Highly conductive solid electrolytes are crucial to the development of efficient all-solid-state batteries. Meanwhile, ion conductivities lithium match those liquid used in commercial Li+ However, concerns about future availability and price made Na+ conductors come into spotlight recent years. Here we present superionic conductor Na11 Sn2 PS12 , which possesses a room temperature conductivity close 4 mS cm-1 thus highest value known date for sulfide-based solids. Structure determination...
A new lithium chalcogenidotetrelate, denoted as LiChT phase, with the elemental combination Li/Sn/S was synthesized solvent-free and solvent-containing salts. We present discuss syntheses, crystal structures, spectroscopic thermal properties of phases, well Li+ ion conductivity Li4SnS4, which is formally related to thio-LISICON parent system Li4GeS4, thus represents first member a thiostannate-LISICON family. The title compound shows very promising 7 × 10–5 S·cm–1 at 20 °C 3 10–3 100 °C,...
Ionothermal reactions of [Ge(4)Se(10)](4-) with SnCl(4)·5H(2)O yielded [BMMIm](24)[Sn(36)Ge(24)Se(132)] (ZBT-1) and [BMIm](24)[Sn(32.5)Ge(27.5)Se(132)] [ZBT-2; B(M)MIm = 1-butyl-(2,)3-(di)methylimidazolium]. These contain the largest known discrete polyanion consisting only main-group elements. In spite a zeolite-related composition, 192-atom "zeoball" anion adopts spherical shape, which has been unprecedented in chemistry zeolites their homologues relatives. Preliminary studies indicated...
Converting infrared into visible There is a constant societal drive to develop new light sources that are both efficient and environmentally benign. Rosemann et al. developed an amorphous material emits broadband (warm white) spectrum of upon excitation with laser via highly nonlinear processes. Inorganic nanocrystals form the core their coated organic ligands on surface. When excited light, optical processes cause emit white light. Science , this issue p. 1301
Self-assembly of ZnCl(2) and the ligand 2,4,6-tris(4-pyridyl)pyridine (pytpy) in solution yields [(ZnCl(2))(12)(pytpy)(8)](n)·xCHCl(3), a polycatenane consisting strand mechanically interlocking icosahedral cages with an inner volume more than 2700 Å(3). This can be used to encapsulate guest molecules appropriate size polarity, forming precisely defined three-dimensional array solvent nanodroplets within crystalline framework. The dynamic composition these droplets was studied using...
Bridging the gap! [MnIII6O3(saO)6(OCH3)6Ln2(CH3OH)4(H2O)2] (Ln=La (1), Tb (2), saOH2=salicylaldoxime) were synthesized by a two-step self-assembly process from MnCl2, saOH2, and Ln(NO3)3 under basic conditions in methanol. Both complexes display single-molecule magnet (SMM) properties, with 2 exhibiting one of highest known SMM energy gaps: 103 K (see figure).
Abstract The elucidation of formation mechanisms is mandatory for understanding and planning synthetic routes. For (bio-)organic organometallic compounds, this has long been realized even very complicated molecules, whereas the ligand-free inorganic molecules widely remained a black box to date. This due poor structural relationships between reactants products lack structurally related intermediates—due comparably high coordination flexibility involved atoms. Here we report on investigations...
The encapsulation of actinide ions in intermetalloid clusters has long been proposed but was never realized synthetically. We report the isolation and experimental, as well quantum chemical, characterization uranium-centered [U@Bi12]3–, [U@Tl2Bi11]3–, [U@Pb7Bi7]3–, [U@Pb4Bi9]3–, upon reaction (EE′Bi2)2– (E = Ga, Tl, E′ Bi; E Pb) [U(C5Me4H)3] or [U(C5Me4H)3Cl] 1,2-diaminoethane. For magnetic susceptibility measurements rationalize an unprecedented antiferromagnetic coupling between a U4+ site...
The occurrence of aromaticity in organic molecules is widely accepted, but its purely metallic systems less widespread. Molecules comprising only metal atoms (M) are known to be able exhibit aromatic behaviour, sustaining ring currents inside an external magnetic field along M-M connection axes (σ-aromaticity) or above and below the plane (π-aromaticity) for cyclic cage-type compounds. However, all-metal compounds provide extension electrons' mobility also other directions. Here, we show...
ConspectusBismuth-based research has become a highly topical field in recent years, yielding remarkable prospects for new fundamental insights and materials applications, ranging from innovative catalysts to novel pharmaceuticals, due this heavy metal's virtually nonradioactive nontoxic properties. Given that the 6s2 electron pair can be stereochemically active under certain circumstances, bismuth atoms adopt variety of coordination modes bonding environments with oxidation states (formally)...
The investigation of coinage metal molecular clusters bridged by chalcogen atoms represents an area ever increasing activity in recent chemical and material science research. This is largely due to the relatively high ionic even higher electric conductivity binary chalcogenides, which leads properties intermediate between those semiconducting metallic phases. In addition, size-dependency chemical, physical, structural substances on going from small molecules bulk materials general interest....
Two novel metal coordination polymers, [Zn5Cl4(BBTA)3].3 DMF (1), and [ZnCl(BBTA)(0.5)(DMA)] (2) {H2-BBTA = 1H,5H-benzo(1,2-d:4,5-d')bistriazole}, have been synthesized under solvothermal conditions using ZnCl2 H2-BBTA in (DMF N,N'-dimethylformamide) or DMA (DMA N,N'-dimethylacetamide). Moreover, a highly efficient microwave synthetic route has developed for 1. The structures of both compounds determined by single crystal X-ray diffraction. Compound 1 represents the first example family...
The endohedral cluster anion [Pd(3)Sn(8)Bi(6)](4-) crystallizes as its K([2.2.2]crypt)(+) salt 1 upon reaction of [K([2.2.2]crypt)](2)[Sn(2)Bi(2)]·en and Pd(dppe)(2) in 1,2-diaminoethane (en)/toluene incorporates a complete Pd(3) triangular within medium-size 14-vertex cage Sn Bi atoms. was characterized by combination single crystal diffraction, ESI mass spectrometry, elemental analysis, magnetic measurements. According to quantum chemical investigations, the triangle interacts only weakly...
Two K([2.2.2]crypt) salts of lanthanide-doped semimetal clusters were prepared, both which contain at the same time two types ternary intermetalloid anions, [Ln@Sn(7)Bi(7)](4-) and [Ln@Sn(4)Bi(9)](4-), in 0.70:0.30 (Ln = La) or 0.39:0.61 Ce) ratios. The cluster shells represent nondeltahedral, fullerane-type arrangements 14 13 main group metal atoms that embed Ln(3+) cations. assignment formal +III oxidation states for Ln sites was confirmed by means magnetic measurements reveal a...
La cage aux folles: The [Eu@Sn6Bi8]4− anion (see picture: Sn/Bi blue/orange, Eu black) is the first example of an intermetalloid cluster that embeds a lanthanide ion in solid state. Magnetic measurements and calculations both point to S=7/2 ground state indicate ionic interactions EuII with main-group-metal cage. ESI mass spectrometry suggest forms from two seven-atom hemispheres.