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Updated: Dec 25, 2025

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Modulation of circularly polarized luminescence through excited-state symmetry breaking and interbranched exciton
Kais Dhbaibi1,2, Ludovic Favereau1, Monika Srebro-Hooper3
1Univ Rennes , CNRS , ISCR - UMR 6226 , ScanMAT - UMS 2001 , F-35000 Rennes , France . Email: ludovic.favereau@univ-rennes1.fr ;
Abstract:
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.
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