Vibrational predissociation of Na{sup +} (CH{sub 3}OH){sub m} (m=2-7) from 2.5 to 3.0 microns
- Univ. of Illinois, Urbana, IL (United States)
The vibrational predissociation spectra of Na{sup +} (CH{sub 3}OH){sub m} (m=2-7) clusters were recorded in the frequency range of 2.5 to 3.0 {mu}m, corresponding to the stretch of the O-H functional group in methanol. Hydrogen bonding between two methanols, as in the case of the gas phase dimer, results in two unequivalent methanols, a proton donor and acceptor. The oscillator strength and the frequency of the proton donating methanol are strongly perturbed by the hydrogen bond. Vibrational predissociation induced through excitation of the O-H group can be used to observe the presence of hydrogen bonding. Transitions were observed around 3670 cm{sup -1} for all of the cluster ions studied. This feature is attributed to methanols with the O-H groups that are not acting as proton donors in a hydrogen bond. For clusters of size m {le} 5, absorption features were observed below 3500 cm{sup -1} which correspond to methanols with proton-donating O/H groups. The spectra will be discussed along with structural implications. For comparison, data from Cs{sup +} (CH{sub 3}OH), cluster ions will also be briefly presented.
- OSTI ID:
- 437282
- Report Number(s):
- CONF-9606118--
- Country of Publication:
- United States
- Language:
- English
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