Enhancement and de-enhancement effects in vibrational resonance Raman optical activity.

Abstract

In this study, we investigate interference between several excited electronic states in resonance enhanced vibrational Raman optical activity (RROA) spectra. A gradient Franck-Condon model for the excited-state potential energy surface is applied in order to include vibronic effects in the description of the RROA intensities. Both sum-over-states and time-dependent expressions for the RROA intensities in case of close-lying excited states are given. As an example, we compare the calculated RROA and resonance Raman spectra of (S)-(+)-naproxen-OCD(3) to the experimental ones. Subsequently, we examine the excitation profiles of (S)-(+)-naproxen and study the vibration at 1611 cm(-1) in more detail in order to demonstrate how the consideration of a second excited electronic state can lead to significant changes in the RROA intensities.

DOI: 10.1063/1.3300069

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Cite this paper

@article{Luber2010EnhancementAD, title={Enhancement and de-enhancement effects in vibrational resonance Raman optical activity.}, author={Sandra Luber and Johannes Neugebauer and Markus Reiher}, journal={The Journal of chemical physics}, year={2010}, volume={132 4}, pages={044113} }