Dhbaibi Kais, Favereau Ludovic, Srebro-Hooper Monika, Quinton Cassandre, Vanthuyne Nicolas, Arrico Lorenzo, Roisnel Thierry, Jamoussi Bassem, Poriel Cyril, Cabanetos Clément, Autschbach Jochen, Crassous Jeanne
Univ Rennes , CNRS , ISCR - UMR 6226 , ScanMAT - UMS 2001 , F-35000 Rennes , France . Email:
University of Gabès , Faculty of Science of Gabès , Zrig , 6072 Gabès , Tunisia.
Chem Sci. 2019 Nov 20;11(2):567-576. doi: 10.1039/c9sc05231c. eCollection 2020 Jan 14.
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 to 10 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.
制备了π-螺旋推拉染料，并通过实验和计算研究了它们的（手性）光学性质。观察到双取代体系具有特定的荧光行为，其圆偏振发光（CPL）强度受到前所未有的溶剂效应影响（随着溶剂极性增加，不对称因子从10降至10），这与手性激发态对称性的变化以及支链间激子耦合的抑制有关。这些结果突出了CPL光谱在研究手性π共轭分子中的电子光物理过程并提供更深入理解方面的潜力。
