Optical absorption spectra of PtO and Pt2 in rare-gas matrices

Photoelectron Spectroscopy of Nickel, Palladium, and Platinum Oxide Anions

“…For PtO, more spectroscopic data are available than for PdO, although there are no anion photoelectron spectra. The electronic ground state of PtO was reported to be 1 + in early spectroscopic studies (32)(33)(34). Later, it became clear that the ground state is a 3 − state with a related low-lying state only 936 cm −1 above the ground state (35).…”

“…Later, it became clear that the ground state is a 3 − state with a related low-lying state only 936 cm −1 above the ground state (35). Several investigators have (32)(33)(34)36) reported transitions to visible and ultraviolet states of gaseous PtO, but there are very few data (35,37) on those states lying lower in energy, 0-2 eV above the ground state. Theoretical efforts (27,38) have primarily focused on relativistic effects on the molecular geometry and other physical properties.…”

Spectroscopy of PtO by intra-cavity laser spectroscopy: Identification of the A30+ – x1 electronic transition

“…Experimentally, the PtO radical has been studied by electronic emission spectroscopy [8][9][10][11][12][13]. Sassenberg and Scullman analyzed the PtO emission spectrum between 3800 and 8900 Å [12].…”

“…In this region, several electronic transitions of PtO were recorded and analyzed. Although their original work on PtO assumed the ground state was X 1 R + [8][9][10], they observed a low-lying X = 1 state at $1000 cm À1 , and suggested that these two low-lying states, historically labeled X0 + and x1, were the spin-spin components of a Hund's case (c) ground state, namely the X 3 R À state [12]. In 1991 Frum et al [13] reported a new 3 P state about 7600 cm À1 above the ground state.…”

Pure rotational spectrum of platinum monoxide (PtO) in the ground state

“…Therefore, the PtO radical has been subjected to quantum-chemical calculations [2,3] as a suitable molecule in understanding the Pt-O chemical bonding. Experimentally, the PtO radical has been mainly studied through its electronic spectrum [4][5][6][7][8][9][10]. Recently, Ramond et al [11] observed the photoelectron (PE) spectrum of the PtO À anion and identified the vibrational frequencies and electronic states of the neutral species from the anion spectrum.…”