Quadruply Bridging Strategy Intensifies Circularly Polarized Luminescence of Azapyrenophanes
Multibridged azapyrenophanes were synthesized as organic circularly polarized luminescence (CPL) emitters. The <i>g</i><sub>lum</sub> reached +0.12 and the <i>B</i><sub>CPL</sub> amounted to 2,600 M<sup>-1</sup> cm<sup>-1</sup> at -95 °C. The xylylene-bridging to the binaphthyl-bridged pyrenophane produced a quadruply bridged structure that prompted the pyrene excimer to adopt a <i>D</i><sub>2</sub>-symmetric rigid conformation. This strategy maximized the latent CPL performance. Furthermore, these emitters functioned as temperature- and acid/base-triggered (+)/(-)- or on/off-CPL switches in which enantiospecific responses toward chiral solvents were also observed.
Authors
- Tadashi Ema (ORCID: https://orcid.org/0000-0002-2160-6840)
- Yoshihiro Satō (ORCID: https://orcid.org/0009-0007-1226-2795)
- Kazuto Takaishi
Institutions
- Okayama University (JP)
- Life University (US)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2026-02-03
- DOI
- https://doi.org/10.1021/jacs.5c22797
- Citations
- 1
- Primary Topic
- Synthesis and Properties of Aromatic Compounds
- Type
- article
- Field-Weighted Citation Impact
- 22.95