Donor-Acceptor Type [5]Helicene Derivative with Strong Circularly Polarized Luminescence
Hiromu Kubo, Takashi Hirose, Daiki Shimizu, Kenji Matsuda
Abstract
Abstract Circularly polarized luminescence (CPL) of unsubstituted helicenes is weak due to their low fluorescence quantum yield (Φf) and small dissymmetry factor (gCPL). In this study, we designed and synthesized a donor-acceptor type [5]helicene, 5,10-dicyano-2,13-bis(3,4,5-tris(n-octyloxy)phenyl)[5]helicene. This helicene showed high fluorescence quantum yield (Φf = 0.63) and good |gCPL| (4.2 × 10−3) due to symmetry-allowed transition and its helical structure. Moreover, the helicene showed solvatofluorochromism while maintaining gCPL.
Topics & Concepts
HeliceneChemistryQuantum yieldFluorescenceLuminescenceAcceptorCrystallographyPhotochemistryYield (engineering)MoleculeOrganic chemistryMaterials scienceOptoelectronicsPhysicsOpticsCondensed matter physicsMetallurgySynthesis and Properties of Aromatic CompoundsLuminescence and Fluorescent MaterialsAdvanced NMR Techniques and Applications