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Updated: Feb 5, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
Published on: September 30, 2014
Quadruply Bridging Strategy Intensifies Circularly Polarized Luminescence of Azapyrenophanes
Kazuto Takaishi1, Yoshihiro Sato1, Tadashi Ema1
1Division of Applied Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
None:
Multibridged azapyrenophanes were synthesized as organic circularly polarized luminescence (CPL) emitters. The glum reached +0.12 and the BCPL amounted to 2,600 M-1 cm-1 at -95 °C. The xylylene-bridging to the binaphthyl-bridged pyrenophane produced a quadruply bridged structure that prompted the pyrene excimer to adopt a D2-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.
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