highlight 4 2018

Close proximity of two or more chromophores modifies their photophysical and redox properties compared to the isolated monomers, as testified by changes in the electronic absorption and/or fluorescence spectra. Such differences can be accounted for by the formation of aggregates or donor-acceptor complexes in the ground state, and by a delocalisation of the excitation over both constituents. In collaboration with the Lacour group, we are investigating the excited-state dynamics of dimeric systems, whose conformation can be switched upon addition of cations. For example, the right figure depicts transient absorption spectra measured with the conformation where the chromophores are the closest.

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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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