title: Communication: An accurate global potential energy surface for the ground electronic state of ozone.
abstract: We report a new full-dimensional and global potential energy surface (PES) for the O + O2 → O3 ozone forming reaction based on explicitly correlated multireference configuration interaction (MRCI-F12) data. It extends our previous [R. Dawes, P. Lolur, J. Ma, and H. Guo, J. Chem. Phys. 135, 081102 (2011)] dynamically weighted multistate MRCI calculations of the asymptotic region which showed the widely found submerged reef along the minimum energy path to be the spurious result of an avoided crossing with an excited state. A spin-orbit correction was added and the PES tends asymptotically to the recently developed long-range electrostatic model of Lepers et al. [J. Chem. Phys. 137, 234305 (2012)]. This PES features: (1) excellent equilibrium structural parameters, (2) good agreement with experimental vibrational levels, (3) accurate dissociation energy, and (4) most-notably, a transition region without a spurious reef. The new PES is expected to allow insight into the still unresolved issues surrounding the kinetics, dynamics, and isotope signature of ozone.
authors.affiliation: Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, USA.
authors.forename: Richard
authors.initials: R
authors.lastname: Dawes
authors.forename: Phalgun
authors.initials: P
authors.lastname: Lolur
authors.forename: Anyang
authors.initials: A
authors.lastname: Li
authors.forename: Bin
authors.initials: B
authors.lastname: Jiang
authors.forename: Hua
authors.initials: H
authors.lastname: Guo