Triarylborane-Modified Aza[7]helicenes Featuring Two-Photon Absorption and Dual-State Circularly Polarized Luminescence
Abstract
We here disclose two borylphenyl-substituted aza[7]helicenes, in which two 2,6-bis(trifluoromethyl)phenyl groups were introduced on boron to enhance the charge transfer feature. Both molecules display circularly polarized luminescence (CPL) with high Φ F values in solutions (Φ F = 0.15–0.56), PMMA-doped film (Φ F = 0.99), and neat film (Φ F = 0.77–0.82). Moreover, they exhibit two-photon absorption (TPA) with δ TPA reaching 329 GM for the quadrupolar derivative, representing one of the very rare examples with the integration of dual-state CPL and TPA properties.
Fields of Study & Subjects
Synthesis and Properties of Aromatic Compounds
Nonlinear Optical Materials Studies
Luminescence and Fluorescent Materials
Publication details
- Journal / source
- Organic Letters
- Publisher
- American Chemical Society (ACS)
- Volume
- 28
- Issue
- 9
- Pages
- 2819–2824
- Publication date
- 19 February 2026
- Language
- EN