highlight 10 2018

Close proximity of two or more chromophores modifies their photophysical and redox properties compared to the isolated monomers, as indicated by changes in their electronic absorption and emission spectra as well as their cyclic voltammograms. If the chromophores are covalently linked in stacks, they are forced to be in close proximity and the impact of the coupling between a discrete number of chromophores can be studied at a predefined distance.The 1,4,5,8-Naphthalene Diimide (NDI) stacks synthesized in the Matile group enable us to investigate the delocalization of the excitation throughout the stack and its impact of the electron transfer from the benzyl linker to the NDI core. Preliminary results show an excitation wavelength dependent photo selection of sub-ensembles, which differ by the amount of excitonic coupling and electron transfer dynamics.

1)  A.-B. Bornhof, A. Bauz, A. Aster, Marion Pupier, Antonio Frontera, E. Vauthey, N. Sakai and S. Matile,

J. Am. Chem. Soc., 2018, 140, 14, 4884-4892

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Eric Vauthey

Physical Chemistry Department - Sciences II - University of Geneva
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