Showing papers by "Soo Hyun Lee published in 1999"
TL;DR: In this paper, the authors present nonlinear Raman spectra of intermolecular vibrational transitions in four naphthalene trimer isotopomers, measured at 0.03 cm−1 by mass-selective ionization-loss stimulated Ramran spectroscopy, reveal distinctly shaped pendular band contours.
Abstract: We present nonlinear Raman spectra of intermolecular vibrational transitions in four naphthalene trimer isotopomers. The spectra, measured at 0.03 cm−1 by mass-selective ionization-loss stimulated Raman spectroscopy, reveal distinctly shaped pendular band contours, which, upon comparison to simulated pendular contours, lead to ready assignments for almost all of the observed bands. The results show clearly that the trimer has C3h (or very nearly C3h) symmetry with the naphthalenes arranged such that their long axes are parallel to one another. Comparison of the experimental results to the results of calculations of naphthalene-trimer intermolecular spectra performed by assuming harmonic intermolecular modes and by taking the intermolecular potential energy surface to be a pair-wise additive one reveals significant qualitative agreement. This agreement strongly suggests a relatively rigid cluster with no large amplitude intermolecular motions within 100 cm−1 of the zero-point level. Finally, the results hi...
21 citations