A direct measurement of the dissociation energy of water.
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 dissociation energy obtained from our experiments, 41145.94+/-0.15 cm(-1), is approximately 30 times more accurate than the currently accepted value and has important implications for other thermochemical quantities linked to the bond energy of water.
Maksyutenko
Pavlo
P
Laboratoire de Chimie Physique Moléculaire, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
Rizzo
Thomas R
TR
Boyarkin
Oleg V
OV
D006859:Hydrogen / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
D014867:Water; D006859:Hydrogen; D010100:Oxygen