SPECTROSCOPY OF JET COOLED HYDROGEN BONDED COMPLEXES OF COUMARINS

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1997

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Ohio State University

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The spectroscopy of coumarins 151, 152, and 152a with some hydrogen bonded complexes have been investigated under supersonic jet conditions. Rotational Coherence experiments have been used to measure the structures of the 1:1 complexes. Molecular Mechanics and AMI level calculations were performed and the results compared to experimental observables for each of these systems. Previous studies of coumarins 151 postulate the existence of a TICT state in the bare molecule. We report time domain and hole burning spectra for this case as well as for the hydrogen bonded clusters of all the mentioned species.

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Author Institution: Department of Chemistry, University of Pennsylvania

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