title: Rotational spectroscopic and ab initio studies of the Xe-H2O van der Waals dimer.
abstract: An ab initio potential energy surface of the Xe-H(2)O van der Waals dimer was constructed at the coupled cluster level of theory with single, double, and pertubatively included triple excitations. For the Xe atom, the small-core pseudopotential and augmented correlation-consistent polarized valence quadruple-zeta (aug-cc-pVQZ-PP) basis set was used. Dunning's augmented correlation-consistent polarized valence triple-zeta (aug-cc-pVTZ) basis set was chosen for O and H atoms. Midbond functions were used to supplement the atom-centered basis sets. Rotational spectra of the Xe-H(2)O van der Waals dimer were recorded with a pulsed-nozzle Fourier transform microwave spectrometer. Rotational transitions within two internal rotor states, namely, the 0(00) and 1(01) states, were measured and assigned. Nuclear quadrupole hyperfine structures due to the (131)Xe (I = (3)/(2)), D (I = 1) and (17)O (I = (5)/(2)) nuclei were also observed and analyzed. Information about the molecular structure and the H(2)O angular motions was extracted from the spectroscopic results with the assistance of the ab initio potential.
authors.affiliation: Department of Chemistry, University of Alberta, Edmonton AB T6G 2G2, Canada.
authors.forename: Qing
authors.initials: Q
authors.lastname: Wen
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Jäger
mesh_terms: D003198:Computer Simulation; D019281:Dimerization; D004735:Energy Transfer; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry*; D014978:Xenon / Q000737:chemistry*
chemical_list: D011108:Polymers; D014867:Water; D014978:Xenon