Triarylborane-based [5]Helicenes with Full-Color Circularly Polarized Luminescence

Abstract

The efficient synthetic route was disclosed to prepare optically active triarylborane-based [5]helicenes, <b>7B-PhHC</b> and <b>7B5N-PhHC</b>. Their emission wavelengths are tunable by both the chemical structure modification and the tuning of excited state charge transfer dynamics via selection of appropriate solvents or addition of external F^-, enabling the full-color circularly polarized luminescence with moderate to good quantum yields (0.07-0.51) and high luminescence dissymmetry factors (<i>g</i>_lum > 5 × 10^-3).