Resonance vibrational Raman optical activity: A time-dependent density functional theory approach

L. Jensen, J. Autschbach, M. Krykunov, George C Schatz

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

We present a method to calculate both on- and off-resonance vibrational Raman optical activities (VROAs) of molecules using time-dependent density functional theory. This is an extension of a method to calculate the normal VROA by including a finite lifetime of the electronic excited states in all calculated properties. The method is based on a short-time approximation to Raman scattering and is, in the off-resonance case, identical to the standard theory of Placzek. The normal and resonance VROA spectra are calculated from geometric derivatives of the different generalized polarizabilites obtained using linear response theory which includes a damping term to account for the finite lifetime. Gauge-origin independent results for normal VROA have been ensured using either the modified-velocity gauge or gauge-included atomic orbitals. For the resonance VROA only the modified-velocity gauge has been implemented. We present some initial results for H2 O2 and (S)-methyloxirane and compare with predictions from a simple two-state approximation.

Original languageEnglish
Article number134101
JournalJournal of Chemical Physics
Volume127
Issue number13
DOIs
Publication statusPublished - 2007

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optical activity
Gages
Density functional theory
density functional theory
life (durability)
Excited states
Raman scattering
approximation
Damping
Derivatives
Molecules
damping
Raman spectra
orbitals
predictions
electronics
excitation
molecules

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Resonance vibrational Raman optical activity : A time-dependent density functional theory approach. / Jensen, L.; Autschbach, J.; Krykunov, M.; Schatz, George C.

In: Journal of Chemical Physics, Vol. 127, No. 13, 134101, 2007.

Research output: Contribution to journalArticle

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