Ultrafast inter-ionic charge transfer of transition-metal complexes mapped by femtosecond x-ray powder diffraction
1 Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany
2 Laboratory of Ultrafast Spectroscopy, EPF Lausanne, CH-1015 Lausanne, Switzerland
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Transient electron density maps are derived from x-ray diffraction patterns of photoexcited [Fe(bpy)3]2+(PF6−)2 powder. Upon photoexcitation, the 5T2 quintet state reveals a charge transfer from the PF6− ions and from the Fe atoms to neighboring bpy units. The charge transfer from the Fe points to a partial and weak charge-transfer character of this state.
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