- Benzene type liquid crystal compound and preparation method thereof
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The invention relates to the technical field of liquid crystal compounds, in particular to a benzene liquid crystal compound and a preparation method thereof, wherein the benzene type liquid crystal compound is N. 4 , N4 , N4 ’ , N4 ’ - (9, 9 - Diphenyl - 9H - fluorene -3 - yl) -2 - methyl - [1, 1 ’ - biphenyl] -4, 4 ’ - diamine, the preparation method of the benzene type liquid crystal compound is that 2 - nitrobenzoic acid is used as a starting material to react with oxalyl chloride to obtain 2 - nitrobenzoyl chloride. The reaction was again reacted with bromobenzene to give (4 - bromophenyl) (2 - nitrophenyl) methyl ketone. The reduction reaction is followed by obtaining (4 - bromophenyl) (2 - aminophenyl) methyl ketone. The 3 - bromo - 9H - fluorene -9 - ketone is obtained by using sulfuric acid and sodium nitrite as a catalyst. The Grignard reagent of bromobenzene is reacted again to obtain 3 - bromo -9, 9 - diphenyl - 9H - fluorene. Reaction with cuprous iodide gives 3 - iodine -9, 9 - diphenyl - 9H - fluorene. 2 - Methyl - [1, 1 ’ - biphenyl] -4, 4 ’ - diamine was prepared, and then reacted with 3 - iodine -9, 9 - diphenyl - 9H - fluorene to obtain the benzene-based liquid crystal compound of the present invention. The invention can be applied to preparation of liquid crystal mixtures, liquid crystal display device materials or electro-optical display device materials.
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- Phosphor material containing heteratomic parent nucleus-o-fluorene ring structure and organic light emitting diode
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The invention provides a phosphor material containing a heteratomic parent nucleus-o-fluorene ring structure and an organic light emitting diode and belongs to the technical field of organic photoelectric materials. The technical problems in the prior art that the organic photoelectric material has low luminous efficiency, high driving voltage and other poor luminous properties are solved. The experimental results prove that the organic light emitting diode (OLED) prepared by adopting the phosphor material containing the heteratomic parent nucleus-o-fluorene ring structure disclosed by the invention has the highest luminous efficiency up to 18.8cd/A and the driving voltage of 3.2V. The phosphor material is an excellent OLED material.
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Paragraph 0082; 0085
(2017/09/26)
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- An organic electronic elements and their dialkylfluorene contg.
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The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.
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Paragraph 0165; 0166
(2016/10/08)
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