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Lin, Wei-Bin; He, Dong-Qiang; Lu, Hai-Yan; Hu, Zhi-Qiang; Chen, Chuan-Feng
Chemical communications (Cambridge, England), 02/2020, Letnik: 56, Številka: 12Journal Article
Sign inversions of circularly polarized luminescence (CPL) for the hydro5helicene and 5helicene derivatives were discovered and studied experimentally and theoretically. The inverted CPL signs from the hydro5helicene to 5helicene derivatives were realized by one-step oxidation. The introduction of triphenylamine (TPA) subunits into the helical skeletons also led to the sign inversion of CPL only when there existed an enhanced intramolecular charge-transfer state with a small enough E gap . Sign inversions of CPL by fine-tuning operations on structures of helical compounds were realized by one step-oxidation or TPA-modification.
