Abstract
AbstractFour binary co‐crystals with same molar ratio (1:1) were prepared by solvent evaporation method, involving 3‐(9‐Anthracenyl)‐1‐phenyl‐2‐propen‐1‐one (APPO), 1‐(4‐Methoxyphenyl)‐3‐(1‐pyrenyl)‐2‐Propen‐1‐one (MPPO), 3‐(9‐Anthracenyl)‐1‐(2‐thienyl)‐2‐Propen‐1‐one (ATPO), 1‐Acetyl‐3‐phenyl‐5‐(1‐pyrenyl)‐pyrazoline (APPP) as halogen acceptors and 1,4‐Diiodotetrafluorobenzene (1,4‐DITFB) as halogen donor. Crystal structure analysis reveals that the face‐to‐face pattern of 1,4‐DITFB and donors exist and C−I•••π, C−I•••O interactions mainly formed the crystal structure. X‐ray diffraction data, vibration spectroscopy, thermal behaviors, UV‐visible, absorption spectroscopy and fluorescence properties were exploited to investigate their structures and performance. Such properties are closely related to the delayed fluorescence emission induced by triple‐triple annihilation process. These results demonstrate that these crystals have potential research value in luminescent materials design.
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