Azahelicene-Fused BODIPY Analogues Showing Circularly Polarized Luminescence
Dr. Chihiro Maeda, Keiji Nagahata, Takuma Shirakawa, Prof. Tadashi Ema
Angewandte Chemie Volume132, Issue20 May 11, 2020
Helical carbazole-based BODIPY analogues were readily synthesized via azahelicenes. The structures of azahelicene-incorporated BF2 dyes were elucidated by x-ray diffraction analysis. DFT calculations revealed that the π-conjugated system expanded from the helicene moiety to the BODIPY framework. The azahelicene-fused boron complexes showed the Cotton effects and the circularly polarized luminescence (CPL) in the visible region. Furthermore, an axially chiral binaphthyl group was attached to the helically chiral dyes, which enhanced the chiroptical properties.
Circularly Polarized Luminescence