A5063482399- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Chemical Reaction Mechanisms
- Cold Atom Physics and Bose-Einstein Condensates
- Various Chemistry Research Topics
- Chemical Thermodynamics and Molecular Structure
- Gold and Silver Nanoparticles Synthesis and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Molecular Spectroscopy and Structure
- Photochemistry and Electron Transfer Studies
- Quantum Dots Synthesis And Properties
- Chemical Reactions and Mechanisms
- Organic Chemistry Cycloaddition Reactions
- Quantum, superfluid, helium dynamics
- Spectroscopy and Laser Applications
- Pesticide Residue Analysis and Safety
- Mass Spectrometry Techniques and Applications
- Analytical chemistry methods development
- Atomic and Molecular Physics
University of Basel
2016-2023
ETH Zurich
2015
Water, H$_2$O, is one of the fundamental molecules in chemistry, biology and astrophysics. It exists as two distinct nuclear-spin isomers, para- ortho-water, which do not interconvert isolated molecules. The experimental challenges preparing pure samples isomers have thus far precluded a characterization their individual chemical behaviour. Capitalizing on recent advances electrostatic deflection polar molecules, we separated ground states ortho-water molecular beam to show that exhibit...
The early‐time kinetics (<1 s) of lead sulfide (PbS) quantum dot formation are probed using a novel droplet‐based microfluidic platform, which allows for high‐throughput and real‐time optical analysis the reactive process with millisecond time resolution. reaction platform enables concurrent investigation emission characteristics PbS dots estimation their size concentration during nucleation growth. These investigations reveal two‐stage mechanism nanoparticle formation. first stage...
Diels-Alder cycloadditions are efficient routes for the synthesis of cyclic organic compounds. There has been a long-standing discussion whether these reactions proceed via stepwise or concerted mechanisms. Here, we adopt an experimental approach to explore mechanism model polar cycloaddition 2,3-dibromo-1,3-butadiene with propene ions by probing its conformational specificities in entrance channel under single-collision conditions gas phase. Combining conformationally controlled molecular...
Recent advances in experimental methodology enabled studies of the quantum-state- and conformational dependence reaction 2,3-dibromobutadiene with laser-cooled calcium ions gas phase.
We present and discuss in detail the design characterization of a new linear quadrupole ion trap with additional ejection acceleration electrodes that is coupled to time-of-flight mass spectrometer. Mass spectra Coulomb crystals consisting Ca +,CaO + CaOH ions were recorded post-ejection-acceleration scheme yielding resolution m/Δ m≈700. The second order rate constant for reaction N2O → CaO N2 was measured test usability this apparatus ion-molecule studies. found be 5.49(32)·10−11cm3s−1...
The Diels-Alder cycloaddition, in which a diene reacts with dienophile to form cyclic compound, counts among the most important tools organic synthesis. Achieving precise understanding of its mechanistic details on quantum level requires new experimental and theoretical methods. Here, we present an approach that separates different conformers molecular beam as prerequisite for investigation their individual cycloaddition reaction kinetics dynamics under single-collision conditions gas phase....
Methyl vinyl ketone (C4H6O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared molecular beam methyl with rotational temperature 1.2(2) K and demonstrated the spatial separation s-cis s-trans conformers using electrostatic deflector. The resulting sample density was 1.5(2) × 108 cm–3 for direct laser ionization region. These conformer-selected samples are well suited conformer-specific chemical reactivity studies such as Diels–Alder cycloaddition reactions.
Recent advances in experimental methodology enabled studies of the quantum-state and conformational dependence chemical reactions under precisely controlled conditions gas phase. Here, we generated samples selected gauche s-trans 2,3-dibromobutadiene (DBB) by electrostatic deflection a molecular beam studied their reaction with Coulomb crystals laser-cooled $\mathrm{Ca^{+}}$ ions an ion trap. The rate coefficients for total were found to strongly depend on both conformation DBB electronic...