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- W4286373388 abstract "Herein we describe a novel superhelicene structure consisting of three hexa-peri-hexabenzocoronene (HBC) units arranged in a helical geometry and creating two carbo[5]helicenes and a carbo[7]helicene. The central HBC bears a tropone moiety, which induces a saddle-helix hybrid geometry into the 3D structure of the prepared nanographene. The introduction of multiple helicenes and the position of the tropone unit trigger near-infrared circularly polarized luminescence (NIR-CPL, up to 850 nm, |glum| = 3.0 × 10-3) combined with good photoluminescence quantum yields (ϕF = 0.43) and upconverted emission based on two-photon absorption (TPA). Compared to previously reported superhelicenes of similar size, higher quantum yields, CPL brightness, and red-shifted absorption and emission spectra are achieved. Besides, chiroptical properties of enantiopure thin films were evaluated. These findings place this novel superhelicene as the first NIR-CPL superhelicene ever reported and make it a promising candidate for use as a chiral luminescent material in optoelectronic devices." @default.
- W4286373388 created "2022-07-21" @default.
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- W4286373388 date "2022-01-01" @default.
- W4286373388 modified "2023-10-15" @default.
- W4286373388 title "Highly contorted superhelicene hits near-infrared circularly polarized luminescence" @default.
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- W4286373388 doi "https://doi.org/10.1039/d2sc03452b" @default.
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