Rotational and Vibrational Spectra of Molecular Clusters.
Abstract
This research project studies the rotational and vibrational spectroscopy of hydrogen bonded complexes and van der Waals molecules and develops new techniques for gathering this information. The purpose is to provide basic information for modelling the effects of these molecules in atmospheric phenomena and to achieve insights concerning the intermolecular forces manifested in the weak bonds holding cluster molecules together. Rotational spectra were investigated the molecular beam electric resonance method. High resolution radiofrequency and microwave spectra of complexes observed by this technique give accurate rotational constants, electric dipole moments, and nuclear hyperfine interaction data which was used to provide structural data. Methods were developed for observing vibrational spectra of complexes in molecular beams using CARS. Raman spectra were obtained for molecular beams of HCN and DCN polymers in the CN and CH stretching regions. A force field model for the axial modes of these molecules was constructed by combining infrared and Raman data. Infrared absorption spectra for molecular beams of rare gas-OCS complexes on the au3 monomer mode region were obtained using tunable diode lasers. The spectra are rotationally resolved and the Doppler limited linewidths (0.004 cm) show no evidence of vibrational predissociation broadening.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1986
- Accession Number
- ADA173012
Entities
People
- Thomas R. Dyke
Organizations
- University of Oregon