The rotational spectrum of YOH (X1Σ+) and its deuterium analog YOD have been measured using Fourier transform microwave/millimeter-wave (FTMmmW) techniques. This work is the first pure rotational study of this molecule. YOH and YOD were created in the gas phase in a supersonic expansion from a mixture of yttrium vapor, generated by laser-ablation, and H2O, diluted in argon. Three transitions were measured for YOH and two for YOD in the frequency range 15-52 GHz. These data were analyzed using a 1Σ Hamiltonian, and rotational and centrifugal distortion constants were refined. Based on the rotational constants, the r0 bond lengths of YOH were established to be r(YO) = 1.949(1) Å and r(OH) = 0.921(1) Å, in agreement with past optical work. The YO bond in YOH is longer than in YO, which has r(YO) = 1.790(1) Å. This difference suggests the presence of a single YO bond in the hydroxide and a double YO bond in the oxide.
- FTMmmW spectroscopy
- Laser ablation
- Rotational spectroscopy
- Yttrium hydroxide (YOH)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry