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Updated: Jul 12, 2026

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
Rotationally resolved spectra of jet-cooled RuSi
Ned Lindholm1, Michael D Morse
1Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.
Abstract:
We report the first gas-phase spectroscopic investigation of diatomic ruthenium silicide (RuSi). The molecules were produced by laser ablation of a Ru disk into a flow of helium carrier gas containing 0.5% SiH(4), and were cooled in a supersonic expansion. The RuSi molecules were then studied using resonant two-photon ionization spectroscopy. Investigations conducted in the spectral range from 18,800 to 23,800 cm(-1) show a large number of excited vibronic levels that cannot readily be grouped into electronic band systems. The ground state is been demonstrated to be of (3)Delta(3) symmetry, deriving from the 2delta(3)14sigma(1) electronic configuration. Correcting for the effects of the spin-uncoupling operator, the ground state bond length (r(0)) is determined to be 2.0921+/-0.0004 A (1sigma error limit). Diatomic RuSi is shown to have strong dpi-ppi bonds, unlike the isovalent AlCo molecule.
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