화학공학소재연구정보센터
Chemical Physics Letters, Vol.353, No.1-2, 19-26, 2002
A pulsed field ionization photoelectron-photoion coincidence study of the dissociative photoionization process D2O+h nu -> OD++D+e(-)
We have examined the titled reaction near its threshold using the pulsed field ionization photoelectron-photoion coincidence method. The measured 0 K threshold (18.220 +/- 0.002 eV) has made possible the determination of more precise values for the 0 K bond dissociation energies for D-OD- (5.584 +/- 0.002 eV) and D-OD (5.191 +/- 0.002 eV) and the 0 K heats of formation (DeltaH(10)(0)'s) for OD+ (308.83 +/-0.05 kcal/mol) and OD (8.38 +/- 0.05 kcal/mol). We found that the available energetic data for the OD/OD+ and D2O/D2O+ system are in excellent agreement with those for the OH/OH+ and H2O/H2O+ system after taking into account the zero-point vibration energies of these species. (C) 2002 Published by Elsevier Science B.V.