A<i>C</i>₃-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 <i>C</i>₃ symmetry. In contrast to the reported <i>D</i>₃-symmetric triple oxa[7]helicene, the <i>C</i>₃-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.