Syntheses and Crystal Structures of 9-Ethyl-1,3,6,8-tetra-aryl-9H-carbazole Compounds |
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Authors: | NIU Fang-Fang NIU Han-Ben LIAN Jia-Rong LIU Ya-Wei ZENG Peng-Ju |
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Affiliation: | Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education,College of Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China |
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Abstract: | The title compounds 9-ethyl-1,3,6,8-tetra-p-tolyl-9H-carbazole (1) and 9-ethyl-1,3,6,8-tetrakis-(4-fluoro-phenyl)-9H-carbazole (2) were synthesized and characterized by single-crystal X-ray diffraction. Thereinto, the crystal structures of compounds 1 and 2 were composed by asymmetry units. The ratio of compounds 1 and 2 to the solvent molecule cyclohexane (CYH) is 4/3. X-ray analysis reveals that the 1,3,6,8-phenyl groups are distorted at large angles relative to the planar carbazole ring. Furthermore, the luminescent and thermal properties of 1 and 2 have also been investigated. It can be seen that thermal stability of compound 1 with p-tolyl is better than that of 2 with 4-fluoro-phenyl. Fluorescence spectra analysis showed that compounds 1 and 2 have strong UV emission. |
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Keywords: | crystal structure carbazole photoluminescent properties |
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