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

• DOI: 10.1021/acs.orglett.9b03734
• Publication Date: 2019-11-11T19:51:05Z
• Authors: Zheng-Hua Zhao; Xiao Liang; Mao-Xia He; Meng-Yuan Zhang; Cui-Hua Zhao
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

The efficient synthetic route was disclosed to prepare optically active triarylborane-based [5]helicenes, 7B-PhHC and 7B5N-PhHC. 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 (glum > 5 × 10-3).