The 583.2 GHz torsional hot-band of „D2O...3
نویسندگان
چکیده
We report the observation of a new c-type band of ~D2O!3 at 583.215 92~37! GHz, which we assign to the k5620←610 torsional hot-band. The new data includes the first observation of K50 states for the k511 and k522 levels and effects a correct assignment of these states. A new perturbation was observed for the K52 states of the k5120←210 subband splitting each transition into two equally spaced equal intensity doublets. Analysis of the band and inclusion into a global fit of all torsional bands produces negligible differences with previous analyses, and confirms the validity of the Hamiltonian developed to treat the coupling between torsional motion and overall rotation. The 583.2 GHz band completes the precise characterization of all ~D2O!3 vibrational levels below 100 cm. © 2001 American Institute of Physics. @DOI: 10.1063/1.1337050#
منابع مشابه
Quantitative characterization of the „D2O...3 torsional manifold by terahertz laser spectroscopy and theoretical analysis
We report the measurement of two new perpendicular (D2O)3 torsional bands by terahertz laser vibration–rotation–tunneling ~VRT! spectroscopy of a planar pulsed supersonic expansion. The first ~28.0 cm) band corresponds to the k562 ←0 transition, and is the lowest frequency vibrational spectrum observed for a water cluster. The second ~81.8 cm) band originates in the first excited torsional stat...
متن کاملTerahertz vibration – rotation - tunneling ( VRT ) spectroscopy of the d 6 - water trimer : Complete characterization of the 2 . 94 THz torsional band ( kn = ± 21 00 )
We report the measurement and analysis of the complete perpendicular k = ±2 0 (D2O)3 torsional band (origin 2940.9376(3) GHz), the upper state of which is the highest-energy (98.09912 cm ) torsional state yet observed. All known torsional transitions were included in a new global analysis of the six observed torsional bands, using the effective Hamiltonians derived by van der Avoird et al. [M. ...
متن کاملWater pentamer: characterization of the torsional-puckering manifold by terahertz VRT spectroscopy.
We present the measurement and analysis of five new (D2O)5 bands via vibration-rotation-tunneling (VRT) spectroscopy as well as a preliminary description of a second (H2O)5 band. The vibrationally averaged rotational constants of all five fitted bands agree well with those from the two previously observed (D2O)5 bands and confirm that the pentamer averages to a symmetric, quasi-planar structure...
متن کاملTerahertz vibration–rotation–tunneling spectroscopy of water clusters in the translational band region of liquid water
We report the first direct observation of the hydrogen-bond stretching vibration for a water cluster. A perpendicular band of ~D2O!3 was measured by terahertz laser vibration–rotation–tunneling spectroscopy at 142.8 cm in the ‘‘translational band’’ region of the liquid corresponding to the hindered translational motions of water molecules. We have tentatively assigned the spectrum to transition...
متن کاملBifurcation tunneling dynamics in the water trimer
Recent far-infrared vibration–rotation–tunneling experiments have probed intricate details of the hydrogen bond tunneling dynamics in the water trimer through excitation of intermolecular vibrational transitions to states of sequentially increasing energy. The experimentally observed bifurcation splitting in the water trimer evolves from an equally spaced quartet in the vibrational ground state...
متن کامل