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Published on: December 27, 2018
Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer-π-Dimer Equilibrium
Takuto Kohzuma1, Kei Sugita1, Yosuke Tani1,2
1Department of Chemistry, Graduate School of Science, The University of Osaka, Toyonaka 560-0043, Japan.
None:
Open-shell organic radicals exhibit exceptional photophysical properties due to their unique electronic structures. Herein, we report the 2,5,8-tribromophenalenyl radical (Br-PLY) as a stable, emissive phenalenyl derivative. Br-PLY shows a monomer-π-dimer equilibrium in solution and emits light from its monomeric radical state. Its high air stability (t1/2 ≈ 40 h) and long-lived emission (τ = 252 ns) demonstrate the potential of phenalenyl radicals as promising luminescent materials beyond trityl-based systems.
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