Gui‐Mei Tang, Rui-Hai Chi, Wen-Zhu Wan
May 1, 2017
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Influential Citations
13
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Journal
Journal of Luminescence
Abstract
Abstract Two phenylcarbazole-based dimers, namely, 9,9'-diphenyl-9 H ,9' H −3,3'-bicarbazole ( 1 ) and 9,9'-bis(4-bromophenyl)−9 H ,9' H −3,3'-bicarbazole ( 2 ), have been obtained through the oxidation of 9-phenylcarbazole and 9-(4’-bromophenyl) in the presence of FeCl 3 , respectively, which show strong photoluminescent properties with the fluorescence quantum yields of 0.2 and 0.21 based on the reference of Quinin sulfate, respectively. The maximal emission peak of compounds 1 and 2 were observed at 465 and 413 nm in the solid state, respectively, revealing that the luminescent properties were tuned by the substituent group. The title compounds were characterized by FI-IR, UV–vis, 1 H-NMR, 13 C-NMR, 1 H− 13 C NMR, mass spectra, elemental analysis (EA) and single-crystal X-ray diffraction. Both compounds 1 and 2 crystallize in space group P -1, and supramolecular hydrogen bondings and stacking interactions between aromatic rings are observed. Compounds 1 and 2 display trans- and cis- formation structures, respectively. Two compounds show high thermal stabilities, in which the decomposition temperature is 414 and 363 °C for 1 and 2 , respectively.