Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Posters 2: Biomolecules, Energy Transfer, Clusters, Quantum Chemistry, Molecular Dynamics and Chirality
MO 10.2: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Broadband Microwave Spectroscopy of Biologically Relevant Complexes in the Gas Phase — •Sabrina Zinn1,2,3, Thomas Betz1,2,3, and Melanie Schnell1,2,3 — 1Max Planck Institute for the Structure and Dynamics of Matter, Hamburg/Germany — 2Center for Free-Electron Laser Science, Hamburg/Germany — 3The Hamburg Centre for Ultrafast Imaging, Hamburg/Germany
Molecular recognition plays an important role in nature and is often very sensitive to small changes in the geometric structure. To learn more about molecular recognition we want to study systems which mimic the cell recognition in the protein lectin, where the carbohydrates on a cell surface interact with the aromatic moieties of the protein. We want to study the importance of weak interactions, such as CH/π interactions, for this recognition process. Therefore we will focus on interactions between aromatic molecules such as tryptophan and monosaccharides such as glucose. In particular, we want to compare slightly different recognition partners to get information about the influence of functional groups, steric effects or the molecular forces, which are involved.
We use Chirped-Pulse Fourier-Transform Microwave spectroscopy (CP-FTMW) combined with a supersonic jet to study the molecular complexes. It allows us to record the rotational spectrum from 2 - 8.3 GHz within a single acquisition. We also implemented a laser-ablation source that is crucial for our studies on these fragile molecules.