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Co‐crystals with Delayed Fluorescence Assembled by 1,4‐Diiodotetrafluorobenzene and Polycyclic Aromatic Compounds via Halogen Bonds
Author(s) -
Sun Hao,
Wang Mingliang,
Khan Arshad,
Shan Yaqi,
Zhao Kun,
Usman Rabia,
Xu Chunxiang
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701288
Subject(s) - fluorescence , halogen , halogen bond , crystal structure , spectroscopy , crystal (programming language) , photochemistry , absorption spectroscopy , fluorescence spectroscopy , crystallography , solvent , materials science , pyrazoline , absorption (acoustics) , chemistry , organic chemistry , alkyl , physics , quantum mechanics , computer science , programming language , composite material
Four 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.