dc.creator Gregoire, G. en_US dc.creator Velasquez, J. en_US dc.creator Duncan, M. A. en_US dc.date.accessioned 2006-06-15T20:08:54Z dc.date.available 2006-06-15T20:08:54Z dc.date.issued 2001 en_US dc.identifier 2001-MF-10 en_US dc.identifier.uri http://hdl.handle.net/1811/20051 dc.description Author Institution: University of Georgia; Department of Chemistry, University of Georgia en_US dc.description.abstract Mid-infrared $(2100-2900 cm^{-1})$ photodissociation spectra of mass selected $Fe^{+}-(CO_{2})_{n=2-6}$ clusters are presented. The observed fragmentation channels correspond to the loss of $CO_{2}$ molecules, their numbers depending on the infrared laser intensity. In low power condition, namely a few $mJ/cm^{2}$, clusters undergo simple evaporation of one $CO^{2}$ molecule, while at higher power (hundreds of $mJ/cm^{2}$), multi photon absorption leads to multiple fragment detection, ranking from $Fe^{+}-(CO_{2})_{n-1}$ to $Fe^{+}-(CO_{2})_{2}$. In the latter case, step-by-step solvent evaporation within the temporal width of the laser (8ns) is observed, reflecting that the dissociation rate constant is faster than a few nanosecond. Photodissociation spectra of these clusters show a general blue shift of the resonant $CO^{2}$ asymmetric stretch within the complexes, and this shift decreases as the cluster size increases, which is consistent with the lowering of the $Fe^{+}-(CO_{2})_{2}$ interaction at the expense of the solvation. Furthermore, weaker transitions are observed which could correspond to combination bands with low frequency mode of about $20 cm^{-1}$. en_US dc.format.extent 224922 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title INFRARED RESONANCE ENHANCED PHOTODISSOCIATION SPECTROSCOPY OF $Fe^{+}-(CO_{2})_{n}$ CLUSTERS en_US dc.type article en_US
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