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- W2483012120 abstract "The design and synthesis of aggregation-induced emission (AIE) luminogens have attracted rapidly growing interest owing to the fundamental significance and diverse applications in mechanosensors, optical recording, security papers, and optoelectronic devices. In this contribution we report design and synthesis of four phenanthroimidazoles 3a–3d and explored their mechanochromic and electroluminescence properties. The phenanthroimidazoles 3a–3d were synthesized by Suzuki coupling reaction of iodophenathroimidazoles 2a–2d having different end groups (H, CH3, CF3, and CN) with 4-(1,2,2-triphenylvinyl)phenylboronic acid pinacol ester in good yields. The single crystal X-ray structures of 2b, 2c, 3a, and 3d are reported and show that the multiple phenyl rings in the TPE unit adopt nonplanar orientation. Their photophysical, aggregation induced emission (AIE), mechanochromic, electrochemical, and electroluminescence properties were studied. The phenanthroimidazoles 3a–3d exhibit strong AIE. High color contrast reversible mechanochromism between blue and green color was observed for phenanthroimidazoles 3a–3d. It was found that the solid state emission and mechanochromic behavior of tetraphenylethylene substituted phenanthroimidazoles 3a–3d are functions of the end group on phenanthroimidazole. In addition to the AIE and mechnochromic behavior, 3a and 3d compounds performed well as nondoped blue emitters in the organic light-emitting diodes by affording 3.9% and 4.0% external quantum efficiency, respectively." @default.
- W2483012120 created "2016-08-23" @default.
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- W2483012120 date "2016-08-12" @default.
- W2483012120 modified "2023-10-14" @default.
- W2483012120 title "Effect of End Groups on Mechanochromism and Electroluminescence in Tetraphenylethylene Substituted Phenanthroimidazoles" @default.
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- W2483012120 doi "https://doi.org/10.1021/acs.jpcc.6b06277" @default.
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