A5082943724- Mass Spectrometry Techniques and Applications
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Atomic and Molecular Physics
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Chemical Physics Studies
- Analytical chemistry methods development
- Photochemistry and Electron Transfer Studies
- Remote Sensing and LiDAR Applications
- Indoor Air Quality and Microbial Exposure
- X-ray Spectroscopy and Fluorescence Analysis
- Atmospheric chemistry and aerosols
- Metabolomics and Mass Spectrometry Studies
- Wireless Sensor Networks for Data Analysis
- Atmospheric Ozone and Climate
- Spacecraft Design and Technology
- Porphyrin and Phthalocyanine Chemistry
- Space exploration and regulation
- 3D Modeling in Geospatial Applications
- Hydrology and Watershed Management Studies
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2019-2022
Charles University
2019-2022
Comenius University Bratislava
2013-2018
University of Pavol Jozef Šafárik
2017
V. B. Sochava Institute of Geography
2017
In a combined experimental and theoretical study we characterize dissociative electron attachment (DEA) to, electronically excited states of, Fe(CO)5. Both are relevant for electron-induced degradation of The strongest DEA channel is cleavage one metal-ligand bond that leads to production Fe(CO)4-. High-resolution spectra Fe(CO)4- reveal fine structures at the onset vibrational excitation channels. Effective range R-matrix theory successfully reproduces these as well dramatic rise cross...
Beta-diketones are a versatile class of compounds that can complex almost any metal in the periodic table elements. Their complexes found to be fairly stable and generally have sufficient vapor pressure for deposition techniques requiring volatile sources. Motivated by potential role low energy electrons focused electron beam induced deposition, we carried out crossed electron∕molecular study on dissociative attachment non-dissociative (NDEA) hexafluoroacetylacetone (HFAc) its bidentate...
2,4,6-trichloroanisole and 2,4,6-tribromoanisole were investigated by means of electron transmission spectroscopy two different types dissociative attachment spectrometers. The results obtained interpreted with the support density functional theory calculations. dominant decay channels temporary molecular negative ions lead to formation Cl− Br− in low energy region. Formation long-lived parent anions is observed at thermal energies. Their relative intensity depends on experimental time...
Abstract. Soft chemical ionization mass spectrometry (SCI-MS) techniques can be used to accurately quantify volatile organic compounds (VOCs) in air real time; however, differentiation of isomers still represents a challenge. A suitable pre-separation technique is thus needed, ideally capable analyses over few tens seconds. To this end, bespoke fast gas chromatography (GC) instrument with an electrically heated 5 m long metallic capillary column was coupled selected ion flow tube (SIFT-MS)...
Protonated glyoxal reacts with water molecules to form protonated formaldehyde, interfering SIFT-MS analyses of in humid samples.
In the present study we have performed electron collision experiments with copper carboxylate complexes: [Cu 2 ( t -BuNH ) (µ-O CC F 5 4 ], s (EtNH and ]. Mass spectrometry was used to identify fragmentation pattern of coordination compounds produced in crossed – molecular beam measure dependence ion yields positive negative ions on energy. The dissociation contains a sequential loss both ligands and/or amine from complexes. Moreover, themselves is visible mass spectrum below m / z 140. For...
A study was performed of the reactions protonated acetic acid hydrates, CH3COOHH+(H2O)n, with acetone molecules, CH3COCH3, using a selected ion flow-drift tube (SIFDT). The rationale for this is that hydrated organic molecules are major product ions in secondary electrospray ionization mass spectrometry (SESI-MS) and mobility (IMS). Yet formation reactivity these hydrates only poorly understood, kinetics data sparse. existing SIFDT instrument our laboratory upgraded to include an octupole...
Hydride atomization and the fate of free analyte atoms in an externally heated quartz tube atomizer (QTA) were investigated employing selected ion flow mass spectrometry (SIFT-MS). SIFT-MS proved to be ideally suited study water concentration gases leaving atomizer. This made it possible quantify oxygen "contaminant" rate QTA as 0.04–0.05 mL min–1. is valid for typical conditions hydride generation. Most significantly, studies temperature influence on resulted detailed insight into hydrogen...
Phthalates are widely industrially used and their toxicity is of serious environmental public health concern. Chemical ionization (CI) analytical techniques offer the potential to detect monitor traces phthalate vapours in air or sample headspace real time. Promising include selected ion flow tube mass spectrometry (SIFT-MS), proton transfer reaction (PTR-MS) mobility (IMS). To facilitate such analyses, reactions H3O+, O2+ NO+ reagent ions with molecules need be understood. Thus, chemistry...
Experimental investigation of electron ionization (EI) and attachment (EA) onto dicyclohexyl phthalate (DCHP) was carried out using a crossed molecular beam technique. Formation positive negative ions by EI EA with the corresponding dissociation processes studied discussed. Due to low ion yield parent ion, we were not able estimate energy DCHP. However, estimated appearance energies for protonated anhydride (m/z 149) be 10.5 eV other significant ionic fragments m/z 249 [DCHP-(R-2H)]+, 167...
Mass spectrometry plays an important role in advancing space exploration. It provides unique insights into the composition of dust, micrometeorites, and particles from distant large objects can be used both orbit on surface asteroid.The instrument HANKA (Hmotnostní ANalyzér pro Kosmické Aplikace) is a high-resolution mass spectrometer based electrostatic ion trap, which principal component commercial instruments[1] established biology medicine research, so-called...
Abstract. Soft chemical ionization mass spectrometry (SCI-MS) techniques can be used to accurately quantify volatile organic compounds (VOCs) in air real time; however, differentiation of isomers still represents a challenge. A suitable pre-separation technique is thus needed, ideally capable analyses few tens seconds. To this end, bespoke fast GC with an electrically heated 5 m long metallic capillary column was coupled selected ion flow tube (SIFT-MS) instrument. assess the performance...
Figure S1: Chromatograms of a monoterpene mixture analysed by the MXT-1 column for different profiles heating voltage.Profiles were SIFT-MS using H3O + reagent ion.
<p>Application of mass spectrometry in the space exploration has recently become a hot topic. It can be used for analysis dust, micrometeorites and particles from larger objects.</p><p>For Czech <strong><em>SLAVIA</em></strong> (<strong><em>S</em></strong>pace...