PROBING THE MOLECULAR DYNAMICS OF A Cu(CD$_3$OD) CLUSTER WITH PHOTODETACHMENT-PHOTOIONIZATION SPECTROSCOPY
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Date
2006
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Ohio State University
Abstract
We report the femtosecond nuclear dynamics of neutral Cu(CD$_3$OD) van der Waals clusters, investigated using photodetachment-photoionization spectroscopy. Photodetachment of Cu(CD$_3$OD) anion with a 150 fs 400 nm laser pulse produces a vibrationally excited neutral complex that undergoes ligand reorientation and dissociation. The time evolving neutral is interrogated by delayed femtosecond resonant two photon ionization. This study shows that the nascent Cu(CD$_3$OD) complex dissociates on prompt (3 ps) and slower timescales (30 ps). The prompt component reflects direct dissociation upon photodetachment, while the slower dissociation arises from the coupling of CD$_3$OD molecular rotation into the Cu-(CD$_3$OD) dissociation coordinate. Theoretical investigations provide insight to the nature of the molecular dynamics which produce the observed dissociation characteristics. Supported by NSF and AFOSR
Description
Author Institution: JILA/Department of Chemistry, University of Colorado, Boulder, CO 80309; Department of Chemistry, Ohio State University, Columbus, OH 43210