Ramanstreuung am Überschallstrahl: Wasserstoffbrückendynamik aus neuer Perspektive (English shop)

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This dissertation investigates hydrogen-bond dynamics in molecular aggregates using spontaneous Raman scattering in supersonic jet expansions. A dedicated Raman jet spectrometer was developed to enable the analysis of vibrationally cooled molecular clusters. The research focuses on water, alcohols, pyrrole, carboxylic acids, oximes, and α-hydroxymethyl esters. By comparing Raman and infrared spectra, molecular vibrational modes are identified and hydrogen-bonding topologies are examined. Quantum chemical calculations support the interpretation of experimental results. Particular emphasis is placed on Davydov splitting, vibrational coupling, and O–H stretching vibrations in cyclic molecular aggregates. Investigations of methanol clusters and carboxylic acid dimers provide further insights into intermolecular interactions and hydrogen bonding. The findings demonstrate the potential of Raman spectroscopy as a complementary technique to infrared spectroscopy and contribute to a deeper understanding of hydrogen-bonded molecular systems.