1. Terahertz VRT Spectroscopy of the Water Tetramer-d8: Combined Analysis of Vibrational Bands at 4.1 THz and 2.0 THz
Wei Lin, Jia-xiang Han, Lynelle K. Takahashi, Heather A. Harker, Frank N. Keutsch, Richard J. Saykally
Department of Chemistry, University of California, Berkeley, California
June 22, 2007 Columbus, OH

2. Characterization of Water Clusters

3. Berkeley Terahertz VRT Spectrometer

4. The Water Trimer Torsional D2O trimer H2O trimer Translational
142cm-1
Translational
~ 525cm-1
Librational
Torsional
D2O trimer
H2O trimer
(Han et al, Talk RA02, 2006)

5. The Water Trimer
(Han et al, Talk RA02, 2006)

6. The Water Tetramer

7. Tunneling splittings for vibrational modes of the water tetramer2
Brown et al. J. Chem. Phys. 1999, 111, 7801

8. Additional Splittings for K=2 Transitions of the 2.03 THz Band
Cruzan et al. Science 1996,
Cruzan et al. J. Chem. Phys. 1996, 105, 6634

9. Effective Hamiltonian
2.03 THz parallel band:
4.13 THz perpendicular band:
Van der Avoird et al. J. Chem. Phys. 1996,
Keutsch et al. Chem. Rev. 2003, 103, 2533

10. Spectroscopic constants

11. Vibrational Analysis Schütz et al. J. Chem. Phys. 1995, 103, 6114
Sabo et al. J. Chem. Phys., 1998, 109, 5404
Dunn et al. J. Phys. Chem. A 2006, 110, 303 and private communications

12. Comparison of the Inertia Defects of the Water Trimer and Tetramer

13. Acknowledgement Dr. Herbert Pickett (JPL)
Prof. Stewart Novick (Wesleyan University)
Prof. George Shields (Hamilton College)