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dc.contributor.authorGupta, Priyanka
dc.contributor.authorLane, Joseph R.
dc.contributor.authorKjaergaard, Henrik G.
dc.identifier.citationGupta, P., Lane, J.R. & Kjaergaard, H.G. (2010). Molecular dynamic simulations of OH-stretching overtone induced photodissociation of fluorosulfonic and chlorosulfonic acid. Physical Chemistry Chemical Physics, 12, 8277-8283.en_NZ
dc.description.abstractWe investigate the OH-stretching overtone dynamics of fluorosulfonic acid (FSO₃H) and chlorosulfonic acid (ClSO₃H) using classical trajectory simulations. The initial nuclear coordinates and momenta for the trajectories are sampled from anharmonic correlation-corrected vibrational self consistent field (CC-VSCF) wavefunctions. We consider both OH-stretching overtone states and combination states containing a mix of OH-stretching overtones and SOH-bending or OSOH-torsional modes. Our molecular dynamics simulations confirm that photodissociation of these sulfonic acids to form the corresponding hydrogen halides and sulfur trioxide (HF + SO₃ and HCl + SO₃), is possible via highly vibrationally excited states on a picosecond timescale. Hydrogen-hopping events are also observed in the trajectories whereby the hydrogen atom of the excited OH group is found to migrate to one of the adjacent S O groups. The transition states, activation energies and dissociation dynamics of FSO₃H and ClSO₃H are found to be similar to those of H₂SO₄. We suggest that these halogenated sulfonic acids should be suitable proxy molecules for an experimental investigation of the OH-stretching overtone induced photodissociation of H₂SO₄ thought to be important in Earths atmosphere.en_NZ
dc.publisherRoyal Society of Chemistryen_NZ
dc.titleMolecular dynamic simulations of OH-stretching overtone induced photodissociation of fluorosulfonic and chlorosulfonic aciden_NZ
dc.typeJournal Articleen_NZ
dc.relation.isPartOfPhysical Chemistry Chemical Physicsen_NZ

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