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Chemical Physics Letters, Vol.575, 1-11, 2013
Imaging bond breaking and vibrational energy transfer in small water containing clusters
This letter presents a brief overview of our recent experimental studies of state-to-state vibrational predissociation (VP) dynamics of small hydrogen bonded (H-bonded) clusters following vibrational excitation. Velocity map imaging (VMI) and resonance-enhanced multiphoton ionization (REMPI) are used to determine accurate bond dissociation energies (D-0) of (H2O)(2), (H2O)(3), HCl-H2O and NH3-H2O. Pair-correlated product energy distributions from the VP of these complexes are also presented and compared to theoretical models. Further insights into mechanisms are obtained from the recent quasi-classical trajectory (QCT) calculations of Bowman and coworkers. The D-0 values for (H2O)(2) and (H2O)(3) are in very good agreement with recent calculated values, and the results are used to estimate the contributions of cooperative interactions to the H-bonding network. (C) 2013 Elsevier B. V. All rights reserved.