Photoionization of dimeric polyatomic molecules: Proton affinities of H/sub 2/O and HF
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:7208478
Photoionization studies of (H/sub 2/O)/sub 2/ and (HF)/sub 2/ producing H/sub 3/O/sup +/ and H/sub 2/F/sup +/ yield 7.18 +- 0.08 eV (165.8 +- 1.8 kcal/mole) and 4.09 +- 0.06 eV (94.3 +- 1.4 kcal/mole) as the proton affinities of H/sub 2/O and HF, respectively. The measured ionization potential of (H/sub 2/O)/sub 2/, 11.21 +- 0.09 eV, along with the known ionization potential of H/sub 2/O, 12.615 +- 0.001 eV, allow the deduction of a lower bound for the dissociation energy of (H/sub 2/O)/sub 2/:1.58 +- 0.13 eV (36 +- 3 kcal/mole). The experiments have demonstrated that photoionization of dimers is one of the most useful general methods for the determination of proton affinities.
- Research Organization:
- Materials and Molecular Research Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720
- OSTI ID:
- 7208478
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:9; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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