Circularly polarized luminescence from helical N,O-boron-chelated dipyrromethene (BODIPY) derivatives

We report N,O-boron-chelated dipyrromethene derivatives exhibiting circularly polarized luminescence (CPL) in the red/near-infrared region, both in solution and the aggregated state. The CPL is originated from the helical chirality through intramolecular substitution of fluorine by an alkenolic substituent. The self-assembly of the fluorophores significantly enhances the |g_lum| values from 10^-4 to 10^-2.