The Excited-State Creutz-Taube Ion.
German E PieslingerIvana Ramírez-WierzbickiAlejandro CadranelPublished in: Angewandte Chemie (International ed. in English) (2022)
The excited-state version of the Creutz-Taube ion was prepared via visible light excitation of [(NH 3 ) 5 Ru II (μ-pz)Ru II (NH 3 ) 5 ] 4+ . The resulting excited state is a mixed valence {Ru III-δ (μ-pz⋅ - )Ru II+δ } transient species, which was characterized using femtosecond transient absorption spectroscopy with vis-NIR detection. Very intense photoinduced intervalence charge transfers were observed at 7500 cm -1 , revealing an excited-state electronic coupling element H DA =3750 cm -1 . DFT calculations confirm a strongly delocalized excited state. A notable consequence of strong electron delocalization is the nanosecond excited state lifetime, which was exploited in a proof-of-concept intermolecular electron transfer. The excited-state Creutz-Taube ion is established as a reference, and demonstrates that electron delocalization in the excited state can be leveraged for artificial photosynthesis or other photocatalytic schemes based on electron transfer chemistry.
Keyphrases
- electron transfer
- energy transfer
- visible light
- density functional theory
- room temperature
- quantum dots
- cerebral ischemia
- high resolution
- photodynamic therapy
- molecular dynamics
- molecular dynamics simulations
- molecular docking
- drug delivery
- brain injury
- drug discovery
- mass spectrometry
- highly efficient
- drug release
- perovskite solar cells
- genetic diversity
- real time pcr
- subarachnoid hemorrhage