Wavelength-Dependent Photodissociation of [Fe(bpy)3·(CH3OH)n]2+ Clusters, n = 2−6, Triggered by Excitation of the Metal-to-Ligand Charge-Transfer Transition
| Autor: | Thomas G. Spence, Lynmarie A. Posey, and G. Brody Guckenberger, Thomas D. Burns |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | The Journal of Physical Chemistry A. 101:1081-1092 |
| ISSN: | 1520-5215 1089-5639 |
| Popis: | This paper reports the first investigation of the energetics of charge transfer in a coordination complex containing a divalent transition-metal ion as a function of the extent of solvation and provides a detailed description of the first instrument designed for spectroscopic characterization of gas-phase ions and clusters produced by electrospray ionization. Metal-to-ligand charge transfer (MLCT) is probed by laser photofragmentation mass spectrometry in clusters of the complex tris(2,2‘-bipyridyl)iron(II), [Fe(bpy)3]2+, with methanol prepared by electrospray ionization. Excitation of the MLCT transition in [Fe(bpy)3]2+ triggers evaporation of methanol solvent molecules from these clusters, permitting indirect detection of absorption. Measurement of ion beam depletion and/or production of charged photofragments as a function of photon energy yields the red edge of the MLCT band for [Fe(bpy)3·(CH3OH)n]2+ clusters, n = 2−6. Increasing the number of methanol molecules in the clusters shifts the onset of the... |
| Databáze: | OpenAIRE |
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