A C3-symmetric triple oxa[6]helicene with circularly polarized luminescence featuring parallel transition dipole moments

Abstract

We present the synthesis and characterization of the first triple oxa[6]helicene with C₃ symmetry. In contrast to the reported D₃-symmetric triple oxa[7]helicene, the C₃-symmetric analogue holds parallel electric and magnetic transition dipole moments and thus enhanced luminescence dissymmetry, shedding light on the critical role of molecular symmetry on chiroptical response.