@article {1088, title = {The influence of nuclear volume and electronic structure on the rotational energy of platinum monoxide, PtO}, journal = {Physical Chemistry Chemical Physics}, volume = {7}, number = {12}, year = {2005}, note = {ISI Document Delivery No.: 942UOTimes Cited: 11Cited Reference Count: 56}, month = {Jun}, pages = {2453-2459}, type = {Article}, abstract = {The pure rotational spectra of seven isotopic species of platinum monoxide have been measured with a cavity pulsed jet Fourier-transform microwave spectrometer. The molecules were prepared by laser ablation of Pt foil in the presence of O-2 and stabilized in a supersonic jet of argon. A multi-isotopomer Dunham-type analysis of the spectra produced values for Y-01 and Y-11, along with unusually large values for Born-Oppenheimer breakdown (BOB) parameters for both Pt and O atoms. The values of the BOB parameters have been rationalized in terms of the molecular electronic structure and finite nuclear size (field shift) effects. A large negative Pt-195 effective nuclear spin-rotation constant has been rationalized in terms of the electron-nucleus dipole dipole hyperfine constant. Precise internuclear separations have been evaluated.}, keywords = {COUPLING CASE C, DIATOMIC-MOLECULES, DIPOLE MOMENT, DUNHAM COEFFICIENTS, EMISSION-SPECTRUM, FIELD SHIFT, FOURIER-TRANSFORM SPECTROSCOPY, GROUND-STATE, HYPERFINE CONSTANTS, PB-CHALCOGENIDES}, isbn = {1463-9076}, url = {://000230308600007}, author = {Cooke, S. A. and Gerry, M. C. L.} }