highlight 9 2022

We investigate photoinduced symmetry-breaking charge separation (SB-CS) processes between identical molecules in a PDI-based cage synthesized in the Solomek group in Bern. The figure on the right shows the transient absorption electronic spectra in the UV-Vis-NIR region of this compound. As the solvent polarity increases, the charge-separated state appears as evidenced by the transient bands located at 650 nm (radical cation), and at 700, 800, and 970 nm (radical anion). The analysis of the data with the target model depicted in the figure yielded distinct Species-Associated Spectra (SAS) dominated by the S1 state, the cation and the anion (e). This good fit supports the validity of this model.  

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Eric Vauthey

Physical Chemistry Department - Sciences II - University of Geneva
30, Quai Ernest Ansermet - CH-1211 Geneva 4 (Switzerland)

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