A5083977280- NMR spectroscopy and applications
- Advanced NMR Techniques and Applications
- Advanced MRI Techniques and Applications
- Analytical Chemistry and Chromatography
- Radiation Detection and Scintillator Technologies
- Semiconductor materials and devices
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Corrosion Behavior and Inhibition
- Metabolomics and Mass Spectrometry Studies
- Lanthanide and Transition Metal Complexes
- Atmospheric and Environmental Gas Dynamics
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Mass Spectrometry Techniques and Applications
- Phase Equilibria and Thermodynamics
- Electrochemical Analysis and Applications
- Photocathodes and Microchannel Plates
- Electrodeposition and Electroless Coatings
- Analytical chemistry methods development
- Machine Learning in Materials Science
- Radiation Effects in Electronics
- Magnetism in coordination complexes
- Ionic liquids properties and applications
- Marine and environmental studies
Johnson Space Center
2008
University of Stuttgart
1985-2004
University of Tübingen
2000-2004
AstraZeneca (Sweden)
2003
University of Kaiserslautern
2002
Max Planck Society
2001
Max Planck Institute for Biological Cybernetics
2001
RWTH Aachen University
2001
University of Basel
1999
Oerlikon (Liechtenstein)
1988
The application of silica-supported TEMPO as a recyclable catalyst in the Anelli oxidation alcohols is reported. easily obtained one-step reductive amination procedure starting from commercially available aminopropyl-functionalized silica. Details synthesis supported and its analysis by MAS NMR are presented. Various alcohol oxidations according to protocol have been carried out stability applied has studied.
A new amphiphilic GdIII chelate, which is capable of forming micelles in aqueous solution (see diagram), has been synthesized. Due to this self-aggregation, the compound a long rotational correlation time and, consequently, high proton relaxivities that thus far have only obtained with macromolecular complexes.
Quantitative 13C NMR spectroscopy was used to investigate the complex chemical equilibria in ternary liquid mixtures of formaldehyde−water−methanol at temperatures between 298 and 383 K. In these mixtures, formaldehyde is predominantly bound methylene glycol, poly(oxymethylene) glycols, hemiformal, hemiformals, which are formed by a series oligomerization reactions. The present study first data on species distribution studied technically important system reported. It complements previous...
In the recent years, it has repeatedly been stated that amines react with CO2 and can therefore not be chromatographed under supercritical conditions CO2. The aim of present work is to elucidate structural requirements lead reaction an amine analyte and, if this occurs, structure formed product. use on-line nuclear magnetic resonance (NMR) spectroscopy a flow probe for fluid chromatography (SFC) enables investigation these unstable analytes in mediums. Several alkyl-substituted secondary...
Abstract High-resolution gas phase measurements of 1 H NMR spectra at 400 MHz and atmospheric pressure seven small hydrocarbons are presented. The developed new method the experimental set-up described. Ab initio GIAO MO calculations 13 C absolute shieldings on HF, MP2 B3LYP levels using 25 standard gaussian basis sets reported for these hydrocarbons, based re distances. measured chemical shifts have been converted to an σ 0 shielding scale by use literature methane. These values transferred...
Different types of immobilized free radicals as well paramagnetic gadolinium(III) complexes were synthesized and used relaxation agents to shorten the spin−lattice times T1 analytes in quantitative continuous-flow 13C nuclear magnetic resonance spectroscopy (NMR). The characterized with electron (EPR) extended X-ray absorption fine structure (EXAFS). With these agents, it was possible obtain a 4-fold increase signal-to-noise ratio per unit time, an almost NMR spectra could be acquired this method.
Abstract No abstracts.
Using the green SC donor-acceptor pair luminescence as a probe threshold hvo of photoneutralization cross section O in GaP is determined by photoluminescence excitation spectroscopy with high accuracy: = (1.4515 ± 0.001) eV. Combining this value measurements spectra and donor conduction band transitions revised values gap Eg (2.350 0.002) eV, binding energy free exciton Ex (22 2) meV energies acceptors may be which are good agreement reported recently literature. Unter Benutzung der grünen...