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Modulation of circularly polarized luminescence through excited-state symmetry breaking and interbranched exciton coupling in helical push–pull organic systems†
Chemical Science ( IF 9.969 ) Pub Date : 2023-02-15 , DOI: 10.1039/c9sc05231c Kais Dhbaibi, Ludovic Favereau, Monika Srebro-Hooper, Cassandre Quinton, Nicolas Vanthuyne, Lorenzo Arrico, Thierry Roisnel, Bassem Jamoussi, Cyril Poriel, Clément Cabanetos, Jochen Autschbach, Jeanne Crassous
Chemical Science ( IF 9.969 ) Pub Date : 2023-02-15 , DOI: 10.1039/c9sc05231c Kais Dhbaibi, Ludovic Favereau, Monika Srebro-Hooper, Cassandre Quinton, Nicolas Vanthuyne, Lorenzo Arrico, Thierry Roisnel, Bassem Jamoussi, Cyril Poriel, Clément Cabanetos, Jochen Autschbach, Jeanne Crassous
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π-Helical push–pull dyes were prepared and their (chir)optical properties were investigated both experimentally and computationally. Specific fluorescent behaviour of bis-substituted system was observed with unprecedented solvent effect on the intensity of circularly polarized luminescence (CPL, dissymmetry factor decreasing from 10−2 to 10−3 with an increase in solvent polarity) that was linked to a change in symmetry of chiral excited state and suppression of interbranched exciton coupling. The results highlight the potential of CPL spectroscopy to study and provide a deeper understanding of electronic photophysical processes in chiral π-conjugated molecules.
更新日期：2020-01-02
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