A direct measurement of the dissociation energy of water
Abstract
We have performed a direct measurement of one of the most fundamental thermochemical values: the O-H bond energy in water. Using a triple-resonance laser excitation scheme, we excite the molecule through a series of vibrational overtone transitions to access directly the onset of the dissociative continuum. The disociation energy obtained from our experiments, 41145.94±0.15cm-1, is ∼30 times more accurate than the currently accepted value and has important implications for other thermochemical quantities linked to the bond energy of water.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- November 2006
- DOI:
- 10.1063/1.2387163
- Bibcode:
- 2006JChPh.125r1101M
- Keywords:
-
- 82.60.Cx;
- 82.37.Vb;
- 33.15.Fm;
- 33.15.Ry;
- 33.80.-b;
- Enthalpies of combustion reaction and formation;
- Single molecule photochemistry;
- Bond strengths dissociation energies;
- Ionization potentials electron affinities molecular core binding energy;
- Photon interactions with molecules