Excited-state symmetry breaking of linear quadrupolar chromophores: A transient absorption study - ENS - École normale supérieure
Communication Dans Un Congrès Année : 2017

Excited-state symmetry breaking of linear quadrupolar chromophores: A transient absorption study

Résumé

The photophysical properties of two highly symmetrical quadrupolar chromophores were studied by both steady-state and transient absorption spectroscopy. Their excited-state behavior is dominated by the solvent-induced Stokes shift of the stimulated-emission band. The origin of this shift is attributed to symmetry breaking that confers a non-vanishing dipole moment to the excited state of both compounds. This dipole moment is large and constant in DMSO, whereas symmetry breaking appears significantly slower and leading to smaller excited-state dipole in toluene. Time-dependent increase of the excited-state dipole moment induced by weak solvation is proposed to explain the results in toluene.

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Chimie
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Dates et versions

hal-04060514 , version 1 (06-04-2023)

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Nadia Dozova. Excited-state symmetry breaking of linear quadrupolar chromophores: A transient absorption study. 4th International Conference on Physical and Theoretical Chemistry, Sep 2017, Dublin (IE), Ireland. ⟨10.4172/2161-0398-C1-025⟩. ⟨hal-04060514⟩
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