Millimeter- and submillimeter-wave spectra of platinum monosulfide (PtS) in the state

Several new vibrational bands of the [12.5] Ω = 0+–X3Σ−Ω=0+ and the [15.9] B Ω = 0+–X3Σ−Ω=0+ transitions have been observed in high resolution absorption measurements recorded using Intracavity Laser Spectroscopy (ILS). These new bands have been rotationally analyzed and incorporated into a comprehensive PtS dataset that was fit to a mass-independent Dunham expression using PGOPHER. The comprehensive dataset included all reported field-free, gas phase spectroscopic data for PtS, including 32 Fourier transform microwave transitions (estimated accuracy: 1 kHz), 9 microwave/optical double resonance transitions (25 kHz), 51 millimeter and submillimeter transitions (25–50 kHz), 469 molecular beam-laser induced fluorescence transitions (0.003 cm−1), and 4870 ILS transitions (0.005 cm−1). The determined equilibrium constants have been used with the Rydberg-Klein-Rees method to produce potential energy curves for the four known electronic states of PtS. Isotopic shifts in electronic transition energy beyond expectations from the Born-Oppenheimer approximation were observed and treated as electronic field-shift effects due to the difference in the nuclear charge radius between Pt isotopes. The magnitude and sign of the determined field-shift parameters are rationalized through the analysis of the previously reported ab initio calculations.

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Millimeter- and submillimeter-wave spectra of platinum monosulfide (PtS) in the state

Cited by 6 publications

References 27 publications

Rotational spectrum of the AgS radical in the X2Πi state

Rotational spectrum of the AgS radical in the X2Πi state

Analysis of the A Ω=1 – X 3Σ‒0+ transition of PtS observed by intracavity laser spectroscopy with fourier transform detection (ILS-FTS), and computational studies of electronic states of PtS

Mass-independent Dunham analysis of the known electronic states of platinum sulfide, PtS, and analysis of the electronic field-shift effect

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