Vibrational spectroscopy of the hydrated hydronium cluster ions H sub 3 O sup + ter dot (H sub 2 O) sub n ( n =1, 2, 3)
- Department of Chemistry, University of California, Berkeley, California 94720 (US) Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (US)
The gas phase infrared spectra of the hydrated hydronium cluster ions H{sub 3}O{sup +}{center dot}(H{sub 2}O){sub {ital n}}({ital n}=1, 2, 3) have been observed from 3550 to 3800 cm{sup {minus}1}. The new spectroscopic method developed for this study is a two color laser scheme consisting of a tunable cw infrared laser with 0.5 cm{sup {minus}1} resolution used to excite the O--H stretching vibrations and a cw CO{sub 2} laser that dissociates the vibrationally excited cluster ion through a multiphoton process. The apparatus is a tandem mass spectrometer with a radio frequency ion trap that utilizes the following scheme: the cluster ion to be studied is first mass selected; spectroscopic interrogation then occurs in the radio frequency ion trap; finally, a fragment ion is selected and detected using ion counting techniques. The vibrational spectra obtained in this manner are compared with that taken previously using a weakly bound H{sub 2} messenger.'' A spectrum of H{sub 7} O{sup +}{sub 3} taken using a neon messenger is also presented. {ital Ab nitio} structure and frequency predictions by Remington and Schaefer are compared with the experimental results.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5041433
- Journal Information:
- Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 91:12; ISSN JCPSA; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
CHARGED PARTICLES
EARTH ATMOSPHERE
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDRATION
HYDRONIUM RADICALS
INFRARED SPECTRA
IONOSPHERE
IONS
MOLECULAR IONS
MULTI-PHOTON PROCESSES
PLANETARY IONOSPHERES
RADICALS
SOLVATION
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
VIBRATIONAL STATES