- Compound, display panel and display device
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The invention belongs to the technical field of OLEDs and provides a compound with a structure shown as a formula I, wherein D1 and D2 represent electron donating units and D1 and D2 are each independently selected from any one of C6-C30 aryl, carbazolyl and derivative groups thereof, acridinyl and derivative groups thereof, diarylamino and derivative groups thereof, and triarylamino and derivative groups thereof, and A1 and A2 represent electron-accepting groups and are each independently selected from a hydrogen atom, a nitrogen-containing heterocyclic substituent, and a cyano-containing substituent. The compound with the coumarin structure has the electron withdrawing capability, and the compound is connected with an electron withdrawing group through coumarin, so that the effect of further improving the electron withdrawing capability is achieved, and the other side of the coumarin is connected with an electron donating unit, so that the whole molecule has a bipolar characteristicand is suitable for being used as a bipolar main body material. The spiro structure has a spatial orthogonal configuration, so that the glass-transition temperature of the material can be effectivelyincreased. The invention further provides a display panel and a display device.
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Paragraph 0106-0110
(2020/07/28)
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- Synthesis method of 3,3'-bis(pinacol easter)diboron-9,9'-spirobifluorene
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The invention discloses a synthesis method of 3,3'-bis(pinacol easter)diboron-9,9'-spirobifluorene, and belongs to the field of organic chemical synthesis. The 3,3'-bis(pinacol easter)diboron-9,9'-spirobifluorene can be applied to design and synthesis of organic photoelectric materials. The synthesis method comprises the following steps: taking bromo iodobenzene as a raw material, catalyzing reaction between the bromo iodobenzene and 1,1'-methylenebis(2-chlorobenzene) through palladium acetate to synthesize 3,3'-dibromo-9,9'-spirobifluorenecan; and then, synthesizing the 3,3'-bis(pinacol easter)diboron-9,9'-spirobifluorene by the 3,3'-dibromo9,9'-spirobifluorenecan and bis(pinacolato)diboron under catalytic action of palladium and an organic phosphine ligand. The synthesis method is good in reaction selectivity, is less in side reactions, and has an overall yield of 75% or higher. The synthesis method is mild in reaction condition, is easy to control, is low in cost, is simple tooperate, and is suitable for industrial production.
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Paragraph 0006; 0016; 0020; 0022
(2017/08/27)
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