Spatial Separation

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Küpper Jochen - One of the best experts on this subject based on the ideXlab platform.

  • Spatial Separation of 2-propanol monomer and its ionization-fragmentation pathways
    'Elsevier BV', 2021
    Co-Authors: Wang Jia, He Lanhai, Petrovic Jovana, Al-refaie Ahmed, Bieker Helen, Onvlee Jolijn, Długołęcki Karol, Küpper Jochen
    Abstract:

    The Spatial Separation of 2-propanol monomer from its clusters in a molecular beam by an electrostatic deflector was demonstrated. Samples of 2-propanol monomer with a purity of 90% and a beam density of $7 \times 10^6$ cm$^{-3}$ were obtained. These samples were utilized to study the femtosecond-laser-induced strong-field multi-photon ionization and fragmentation of 2-propanol using non-resonant 800 nm light with peak intensities of $3–7 \times 10^{13}$ W/cm$^2$

  • Spatial Separation of the Conformers of Methyl Vinyl Ketone
    'American Chemical Society (ACS)', 2021
    Co-Authors: Wang Jia, He Lanhai, Długołęcki Karol, Kilaj Ardita, Willitsch Stefan, Küpper Jochen
    Abstract:

    Methyl vinyl ketone (C$_4$H$_6$O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared a molecular beam of methyl vinyl ketone with a rotational temperature of 1.2(2) K and demonstrated the Spatial Separation of the s-cis and s-trans conformers of methyl vinyl ketone using the electrostatic deflector. The resulting sample density was 1.5(2) × 10$^8$ cm$^{−3}$ for the direct beam in the laser ionization region. These conformer-selected methyl vinyl ketone samples are well suited for conformer-specific chemical reactivity studies such as in Diels−Alder cycloaddition reactions

  • Spatial Separation of 2-propanol monomer and its ionization-fragmentation pathways
    'Elsevier BV', 2020
    Co-Authors: Wang Jia, He Lanhai, Petrovic Jovana, Al-refaie Ahmed, Bieker Helen, Onvlee Jolijn, Długołęcki Karol, Küpper Jochen
    Abstract:

    The Spatial Separation of 2-propanol monomer from its clusters in a molecular beam by an electrostatic deflector was demonstrated. Samples of 2-propanol monomer with a purity of 90 % and a beam density of $7\times10^6~\text{cm}^{-3}$ were obtained. These samples were utilized to study the femtosecond-laser-induced strong-field multi-photon ionization and fragmentation of 2-propanol using non-resonant 800 nm light with peak intensities of $3-7\times10^{13}~W/cm^{2}$.Comment: 5 pages, 3 figure

  • Spatial Separation of the Conformers of Methyl Vinyl Ketone
    'American Chemical Society (ACS)', 2020
    Co-Authors: Wang Jia, He Lanhai, Długołęcki Karol, Kilaj Ardita, Willitsch Stefan, Küpper Jochen
    Abstract:

    Methyl vinyl ketone (C$_4$H$_6$O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared a molecular beam of methyl vinyl ketone with a rotational temperature of 1.2(2)~K and demonstrated the Spatial Separation of the \emph{s-cis} and \emph{s-trans} conformers of methyl vinyl ketone using the electrostatic deflector. The resulting sample density was $1.5(2)\times10^{8}~\text{cm}^{-3}$ for the direct beam in the laser ionization region. These conformer-selected methyl vinyl ketone samples are well suited for conformer-specific chemical reactivity studies such as in Diels-Alder cycloaddition reactions.Comment: Accepted by J. Phys. Chem. A. Manuscript: 5 pages, 3 figures; Supporting information: 3 pages, 5 figure

  • Spatial Separation of state- and size-selected neutral clusters
    'American Physical Society (APS)', 2012
    Co-Authors: Trippel Sebastian, Chang Yuan-pin, Stern Stephan, Mullins Terry, Holmegaard Lotte, Küpper Jochen
    Abstract:

    We demonstrate the Spatial Separation of the prototypical indole(H2O) clusters from the various species present in the supersonic expansion of mixtures of indole and water. The major molecular constituents of the resulting molecular beam are H2O, indole, indole(H2O), and indole(H2O)2. It is a priori not clear whether such floppy systems are amenable to strong manipulation using electric fields. Here, we have exploited the cold supersonic molecular beam and the electrostatic deflector to separate indole(H2O) from the other molecular species as well as the helium seed gas. The experimental results are quantitatively explained by trajectory simulations, which also demonstrate that the quantum-state selectivity of the process leads to samples of indole(H2O) in low-lying rotational states. The prepared clean samples of indole(H2O) are ideally suited for investigations of the stereodynamics of this complex system, including time-resolved half-collision and diffraction experiments of fixed-in-space clusters. Our findings clearly demonstrate that the hydrogen bonded indole(H2O) complex behaves as a rigid molecule under our experimental conditions and that it can be strongly deflected.Comment: 7 pages, 5 figure

Jochen Kupper - One of the best experts on this subject based on the ideXlab platform.

  • note knife edge skimming for improved Separation of molecular species by the deflector
    Review of Scientific Instruments, 2018
    Co-Authors: Sebastian Trippel, Terry Mullins, Melby Johny, Thomas Kierspel, Jolijn Onvlee, Helen Bieker, Lars Gumprecht, Karol Dlugolecki, Jochen Kupper
    Abstract:

    A knife edge for shaping a molecular beam is described to improve the Spatial Separation of the species in a molecular beam by the electrostatic deflector. The Spatial Separation of different molecular species from each other as well as from atomic seed gas is improved. The column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, was enhanced by a factor of 1.5, limited by the virtual source size of the molecular beam.

  • knife edge skimming for improved Separation of molecular species by the deflector
    arXiv: Atomic and Molecular Clusters, 2018
    Co-Authors: Sebastian Trippel, Terry Mullins, Melby Johny, Thomas Kierspel, Jolijn Onvlee, Helen Bieker, Lars Gumprecht, Karol Dlugolecki, Jochen Kupper
    Abstract:

    A knife edge for shaping a molecular beam is described to improve the Spatial Separation of the species in a molecular beam by the electrostatic deflector. The device increases the column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, and it enhances the Spatial Separation of different molecular species from each other as well as from atomic seed gas.

  • Spatial Separation of state and size selected neutral clusters
    Physical Review A, 2012
    Co-Authors: Sebastian Trippel, Yuanpin Chang, Stephan Stern, Terry Mullins, Lotte Holmegaard, Jochen Kupper
    Abstract:

    We demonstrate the Spatial Separation of the prototypical indole(H${}_{2}$O) clusters from the various species present in the supersonic expansion of mixtures of indole and water. The major molecular constituents of the resulting molecular beam are H${}_{2}$O, indole, indole(H${}_{2}$O), and indole(H${}_{2}$O)${}_{2}$. It is a priori not clear whether such floppy systems are amenable to strong manipulation using electric fields. Here, we have exploited the cold supersonic molecular beam and the electrostatic deflector to separate indole(H${}_{2}$O) from the other molecular species as well as the helium seed gas. The experimental results are quantitatively explained by trajectory simulations, which also demonstrate that the quantum-state selectivity of the process leads to samples of indole(H${}_{2}$O) in low-lying rotational states. The prepared clean samples of indole(H${}_{2}$O) are ideally suited for investigations of the stereodynamics of this complex system, including time-resolved half-collision and diffraction experiments of fixed-in-space clusters. Our findings clearly demonstrate that the hydrogen bonded indole(H${}_{2}$O) complex behaves as a rigid molecule under our experimental conditions and that it can be strongly deflected.

Sabine Kleinsteuber - One of the best experts on this subject based on the ideXlab platform.

  • Spatial Separation of metabolic stages in a tube anaerobic baffled reactor: reactor performance and microbial community dynamics
    Applied Microbiology and Biotechnology, 2019
    Co-Authors: Ayrat M. Ziganshin, Babett Wintsche, Jana Seifert, Martina Carstensen, Jens Born, Sabine Kleinsteuber
    Abstract:

    Spatial Separation of metabolic stages in anaerobic digesters can increase the methane content of biogas, as realized in a tube anaerobic baffled reactor. Here, we investigated the performance and microbial community dynamics of a laboratory-scale mesophilic anaerobic baffled reactor with four compartments treating an artificial substrate. Due to the activity of fermentative bacteria, organic acids mostly accumulated in the initial compartments. The methane content of the biogas increased while hydrogen levels decreased along the compartments. Microbial communities were investigated based on bacterial 16S rRNA genes, hydA genes encoding Fe–Fe-hydrogenases, and mcrA genes/transcripts encoding the methyl-CoM reductase. The metaproteome was analyzed to identify active metabolic pathways. During the reactor operation, Clostridia and Bacilli became most abundant in the first compartment. Later compartments were dominated by Sphingobacteriia , Deltaproteobacteria , Clostridia , Bacteroidia , Synergistia , Anaerolineae , Spirochaetes , vadinHA17, and W5 classes. Methanogenic communities were represented by Methanomicrobiales , Methanobacteriaceae , Methanosaeta , and Methanosarcina in the last compartments. Analysis of hydA and mcrA genes and metaproteome data confirmed the Spatial Separation of metabolic stages. In the first compartment, proteins of carbohydrate transport and metabolism were most abundant. Proteins assigned to coenzyme metabolism and transport as well as energy conservation dominated in the other compartments. Our study demonstrates how the Spatial Separation of metabolic stages by reactor design is underpinned by the adaptation of the microbial community to different niches.

Sebastian Trippel - One of the best experts on this subject based on the ideXlab platform.

  • note knife edge skimming for improved Separation of molecular species by the deflector
    Review of Scientific Instruments, 2018
    Co-Authors: Sebastian Trippel, Terry Mullins, Melby Johny, Thomas Kierspel, Jolijn Onvlee, Helen Bieker, Lars Gumprecht, Karol Dlugolecki, Jochen Kupper
    Abstract:

    A knife edge for shaping a molecular beam is described to improve the Spatial Separation of the species in a molecular beam by the electrostatic deflector. The Spatial Separation of different molecular species from each other as well as from atomic seed gas is improved. The column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, was enhanced by a factor of 1.5, limited by the virtual source size of the molecular beam.

  • knife edge skimming for improved Separation of molecular species by the deflector
    arXiv: Atomic and Molecular Clusters, 2018
    Co-Authors: Sebastian Trippel, Terry Mullins, Melby Johny, Thomas Kierspel, Jolijn Onvlee, Helen Bieker, Lars Gumprecht, Karol Dlugolecki, Jochen Kupper
    Abstract:

    A knife edge for shaping a molecular beam is described to improve the Spatial Separation of the species in a molecular beam by the electrostatic deflector. The device increases the column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, and it enhances the Spatial Separation of different molecular species from each other as well as from atomic seed gas.

  • Spatial Separation of state and size selected neutral clusters
    Physical Review A, 2012
    Co-Authors: Sebastian Trippel, Yuanpin Chang, Stephan Stern, Terry Mullins, Lotte Holmegaard, Jochen Kupper
    Abstract:

    We demonstrate the Spatial Separation of the prototypical indole(H${}_{2}$O) clusters from the various species present in the supersonic expansion of mixtures of indole and water. The major molecular constituents of the resulting molecular beam are H${}_{2}$O, indole, indole(H${}_{2}$O), and indole(H${}_{2}$O)${}_{2}$. It is a priori not clear whether such floppy systems are amenable to strong manipulation using electric fields. Here, we have exploited the cold supersonic molecular beam and the electrostatic deflector to separate indole(H${}_{2}$O) from the other molecular species as well as the helium seed gas. The experimental results are quantitatively explained by trajectory simulations, which also demonstrate that the quantum-state selectivity of the process leads to samples of indole(H${}_{2}$O) in low-lying rotational states. The prepared clean samples of indole(H${}_{2}$O) are ideally suited for investigations of the stereodynamics of this complex system, including time-resolved half-collision and diffraction experiments of fixed-in-space clusters. Our findings clearly demonstrate that the hydrogen bonded indole(H${}_{2}$O) complex behaves as a rigid molecule under our experimental conditions and that it can be strongly deflected.

Wang Jia - One of the best experts on this subject based on the ideXlab platform.

  • Spatial Separation of 2-propanol monomer and its ionization-fragmentation pathways
    'Elsevier BV', 2021
    Co-Authors: Wang Jia, He Lanhai, Petrovic Jovana, Al-refaie Ahmed, Bieker Helen, Onvlee Jolijn, Długołęcki Karol, Küpper Jochen
    Abstract:

    The Spatial Separation of 2-propanol monomer from its clusters in a molecular beam by an electrostatic deflector was demonstrated. Samples of 2-propanol monomer with a purity of 90% and a beam density of $7 \times 10^6$ cm$^{-3}$ were obtained. These samples were utilized to study the femtosecond-laser-induced strong-field multi-photon ionization and fragmentation of 2-propanol using non-resonant 800 nm light with peak intensities of $3–7 \times 10^{13}$ W/cm$^2$

  • Spatial Separation of the Conformers of Methyl Vinyl Ketone
    'American Chemical Society (ACS)', 2021
    Co-Authors: Wang Jia, He Lanhai, Długołęcki Karol, Kilaj Ardita, Willitsch Stefan, Küpper Jochen
    Abstract:

    Methyl vinyl ketone (C$_4$H$_6$O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared a molecular beam of methyl vinyl ketone with a rotational temperature of 1.2(2) K and demonstrated the Spatial Separation of the s-cis and s-trans conformers of methyl vinyl ketone using the electrostatic deflector. The resulting sample density was 1.5(2) × 10$^8$ cm$^{−3}$ for the direct beam in the laser ionization region. These conformer-selected methyl vinyl ketone samples are well suited for conformer-specific chemical reactivity studies such as in Diels−Alder cycloaddition reactions

  • Spatial Separation of 2-propanol monomer and its ionization-fragmentation pathways
    'Elsevier BV', 2020
    Co-Authors: Wang Jia, He Lanhai, Petrovic Jovana, Al-refaie Ahmed, Bieker Helen, Onvlee Jolijn, Długołęcki Karol, Küpper Jochen
    Abstract:

    The Spatial Separation of 2-propanol monomer from its clusters in a molecular beam by an electrostatic deflector was demonstrated. Samples of 2-propanol monomer with a purity of 90 % and a beam density of $7\times10^6~\text{cm}^{-3}$ were obtained. These samples were utilized to study the femtosecond-laser-induced strong-field multi-photon ionization and fragmentation of 2-propanol using non-resonant 800 nm light with peak intensities of $3-7\times10^{13}~W/cm^{2}$.Comment: 5 pages, 3 figure

  • Spatial Separation of the Conformers of Methyl Vinyl Ketone
    'American Chemical Society (ACS)', 2020
    Co-Authors: Wang Jia, He Lanhai, Długołęcki Karol, Kilaj Ardita, Willitsch Stefan, Küpper Jochen
    Abstract:

    Methyl vinyl ketone (C$_4$H$_6$O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared a molecular beam of methyl vinyl ketone with a rotational temperature of 1.2(2)~K and demonstrated the Spatial Separation of the \emph{s-cis} and \emph{s-trans} conformers of methyl vinyl ketone using the electrostatic deflector. The resulting sample density was $1.5(2)\times10^{8}~\text{cm}^{-3}$ for the direct beam in the laser ionization region. These conformer-selected methyl vinyl ketone samples are well suited for conformer-specific chemical reactivity studies such as in Diels-Alder cycloaddition reactions.Comment: Accepted by J. Phys. Chem. A. Manuscript: 5 pages, 3 figures; Supporting information: 3 pages, 5 figure