STRUCTURAL STUDIES OF AROMATIC-AROMATIC DIMER SPECIES USING ROTATIONAL COHERENCE SPECTROSCOPY

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1992

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Ohio State University

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The aromatic-aromatic dimer pairs, perylene--benzene, perylene--toluene, fluorene--benzene and fluorene--toluene have been studied using rotational coherence spectroscopy $(RCS)^{1}$. RCS is a time-domain technique of rotational spectroscopy that observes rotational quantum beats from a coherently excited sample. These quantum beats give rise to well localized features, transients, in the spectrum that are directly related to the rotational constants of the species. Probable geometries for the species are then deduced by varying structural parameters in a non-linear least squares fit to the rotational constants obtained.

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$^{1}$P. M. Felker and A. H. Zewail, J. Chem. Phys. 86, 2460 (1987)
Author Institution: Department of Chemistry Biochemistry, University of California at Los Angeles

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