# HIGH RESOLUTION VIBRATIONAL SPECTROSCOPY ON HOMOGENEOUS COMPLEXES OF BENZENE AND DEUTERATED BENZENES

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 Title: HIGH RESOLUTION VIBRATIONAL SPECTROSCOPY ON HOMOGENEOUS COMPLEXES OF BENZENE AND DEUTERATED BENZENES Creators: Henson, B. F.; Hartland, G. V.; Venturo, V. A.; Hertz, R. A.; Felker, P. M. Issue Date: 1990 Publisher: Ohio State University Abstract: This work presents preliminary data on the application of Fourier Transform Ionization Detected Stimulated Raman Spectroscopy (FTIDSRS) to the ground state vibrational structure of benzene and deuterated benzene homogeneous complexes. The benzene totally symmetric vibrational mode at $993 cm^{-1}$ is used to probe, at high resolution, vibrational shifts and splittings as a function of complexation for the benzene dimer, trimer and mixed complexes of $d_{l}$ and $d_{6}$ benzene. The pure dimer complex exhibits three lines in this region, with some indication that strikingly different temporal dynamics may obtain for two of the three features. The pump-probe nature of the IDSRS scheme has been utilized to set lower limits on the lifetimes of these $complexes.^{1}$ In these experiments the complexes are not probed until approximately 10 nsec. after vibrational excitation via the stimulated Raman step. Thus, only those complexes whose lifetime exceeds this 10 nsec. delay can give rise to signal. We have used this fact to asses a 10 nsec. lower bound on the lifetime of the pure benzene dimer and trimer, a limit that is in sharp contrast to other measurements made on different fundamental bands in this energy $region.^{2}$ Description: $^{1}$ B. F. Henson, G.V. Hartland, V. A. Venturo, and P. M. Felker, J. Chem. Phys. 91, 2751, (1989) $^{2}$ R. D. Johnson, S. Burdenski, M. A. Hoffbauer, C. F. Giese, and W. R. Gentry, J. Chem. Phys. 84, 2624, (1986) Author Institution: Department of Chemistry and Biochemistry, University of California, Los Angeles URI: http://hdl.handle.net/1811/18096 Other Identifiers: 1990-ME-7