Abstract
The effect of the catalytic moiety on the early-time photodynamics of Ru/M (M=Pt or Pd) bimetallic photocatalysts is studied by ultrafast transient absorption spectroscopy. In comparison to the Ru/Pd photocatalyst described earlier, the Ru/Pt analogue shows complex excited-state dynamics with three distinct kinetic components ranging from sub-ps to 102 ps, requiring a more sophisticated photophysical model than that developed earlier for the Ru/Pd complex. In the Pu/Pt photocatalyst, an additional lower-lying excited state is proposed to quench the hot higher-lying triplet metal-to-ligand chargetransfer
states. Furthermore, a strong excitation wavelength dependence on the population of excited states is observed for both the Ru/Pt and Ru/Pd complexes, indicating a nonequilibrated distribution even on the 102 ps timescale. These insights shed light on the significant impact of the catalytic
moiety on the fundamental early-time photophysics of Rubased photocatalysts.
Original language | English |
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Pages (from-to) | 2654-2659 |
Number of pages | 6 |
Journal | ChemPhysChem |
Volume | 17 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- IR-101573
- METIS-318133