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- W2965033218 abstract "Abstract The photophysics of a structurally unique aza‐analogue of polycyclic aromatic hydrocarbons characterized by 12 conjugated rings and a curved architecture was studied in detail. The combined experimental and computational investigation reveals that the lowest excited state has charge‐transfer character, in spite of the absence of any peripheral electron‐withdrawing groups. The exceptionally electron‐rich core comprised of two fused pyrrole rings is responsible for it. The observed strong solvatofluorochromism is related to symmetry breaking occurring in the emitting excited state, leading to a significant dipole moment (13.5 D) in the relaxed excited state. The anomalously small fluorescence anisotropy of this molecule, which is qualitatively different from what is observed in standard quadrupolar dyes, is explained as due to the presence of excited states that are close in energy but have different polarization directions." @default.
- W2965033218 created "2019-08-13" @default.
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- W2965033218 date "2019-10-02" @default.
- W2965033218 modified "2023-09-30" @default.
- W2965033218 title "Excited‐State Symmetry Breaking in an Aza‐Nanographene Dye" @default.
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- W2965033218 doi "https://doi.org/10.1002/chem.201902554" @default.
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