Sökning: "far-infrared gas-phase spectroscopy"

Hittade 4 avhandlingar innehållade orden far-infrared gas-phase spectroscopy.

  1. 1. Structure-Specific Vibrational Modes of Isolated Biomolecules Studied with Mid- and Far-Infrared Laser Spectroscopy

    Författare :Vasyl Yatsyna; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; far-infrared gas-phase spectroscopy; conformers; vibrational anharmonicity; infrared multiple photon dissociation; peptide structure; folded and extended peptides; hydrogen bonding;

    Sammanfattning : Biomolecular structure elucidation is crucial for our detailed understanding of various biological processes, since there is an intimate relationship between the biomolecular function and structure. In this respect, isolated biomolecules, despite being outside of their natural environment, are perfect model systems for in-depth studies of various fundamental interactions that govern the formation of biomolecular structure. LÄS MER

  3. 2. Far-infrared conformer-specific signatures of small aromatic molecules of biological importance

    Författare :Vasyl Yatsyna; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Our understanding of many biological processes requires knowledge about biomolecular structure and weak intra- and intermolecular interactions (e.g. hydrogen bonding). Both molecular structure and weak interactions can be directly studied by far-infrared (or THz) spectroscopy, which probes low-frequency molecular vibrations. LÄS MER

  4. 3. An Infrared Study of Intermolecular Interactions in Gaseous Hydrogen Bonded Molecular Complexes

    Författare :René Wugt Larsen; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; intermolecular potential energy surface; Physical chemistry; Fysikalisk kemi; synchrotron radiation; infrared absorption spectroscopy; intermolecular vibration; molecular complex; Intermolecular interactions; hydrogen bond;

    Sammanfattning : Intermolecular interactions are responsible for the deviations of gases from ideality, determine the three- dimensional structure and folding dynamics of biological molecules, and the binding of molecules to surfaces as in heterogeneous catalysis. The hydrogen bond is the most important intermolecular interaction. LÄS MER

  5. 4. Spectroscopical and electron diffraction studies of some unsaturated chlorohydrocarbons

    Författare :Astrid Borg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis deals with structural properties of unsaturated chlorhydrocarbons of general formulas C^H^Cl, C^H^Cl and as studied by microwave spectroscopy, electron diffraction and vibrational spectroscopic methods. The two former methods both give values of molecular structure parameters in gas phase, but due to different averages of the thermal motion the structures arrived at are not comparable. LÄS MER