What question did this study set out to answer?

The study aims to enhance the performance of circularly polarized luminescence (CPL) in azapyrenophanes.

February 6, 2026

Quadruply Bridging Strategy Intensifies Circularly Polarized Luminescence of Azapyrenophanes

Puntos clave

The study aims to enhance the performance of circularly polarized luminescence (CPL) in azapyrenophanes.
Synthesized multibridged azapyrenophanes as CPL emitters
Created quadruply bridged structures via xylylene and binaphthyl bridging
Measured CPL performance at -95 °C
Investigated enantiospecific responses to chiral solvents
Achieved a luminescence g value of +0.12
Identified a B CPL value of 2,600 M^-1 cm^-1
Demonstrated the rigid conformation of pyrene excimer in D2 symmetry
Emitters functioned as dynamic CPL switches responsive to temperature and acid/base conditions

Resumen

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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Cite This Study

Takaishi et al. (Tue,) studied this question.

synapsesocial.com/papers/698584f98f7c464f230083ac https://doi.org/https://doi.org/10.1021/jacs.5c22797

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