610-71-9Relevant articles and documents
Copolyphenylenes with pendant benzimidazolyl and diethanolaminohexyloxy groups: Synthesis and electron-transporting application in PLEDs
Tseng, Chih-Yang,Su, Wen-Fen,Chen, Yun
, p. 2494 - 2505 (2017)
Two new electron-transporting copolyphenylenes P1NH and P2NH possessing balanced charges crucial to emission efficiency of polymer light-emitting diodes (PLEDs) have been synthesized and applied as an electron-transporting layer (ETL). The main chain structure is all para-linkage for P1NH and both para- and meta-linkage for P2NH, with the same pendant electron-withdrawing benzimidazolyl and polar diethanolaminohexyloxy groups. Both copolymers possess excellent thermal stability (Td > 300 °C, Tg > 100 °C) due to their rigid backbones. In addition, the pendant groups effectively lower LUMO (~ ?2.70 eV) and HOMO (~ ?5.70 eV) levels, resulting in improved electron-transporting and hole-blocking capabilities. Multilayer yellow-emitting PLEDs with a configuration of ITO/PEDOT:PSS/SY/ETL/LiF/Al were successfully fabricated by the spin-coating process. The maximum luminance and maximum current efficiency of the P1NH-based device were 12,881 cd/m2 and 10.94 cd/A, respectively, superior to the performance of P2NH-based device (4938 cd/m2, 3.70 cd/A) and the device without ETL (8690 cd/m2, 2.78 cd/A). Current results indicate that P1NH is highly effective in enhancing electron transport and device performance.
Synthesis method of 2-halo-5-bromobenzoic acid
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Paragraph 0044-0047, (2019/10/01)
The invention discloses a synthesis method of 2-halo-5-bromobenzoic acid. The method comprises the following steps of under the action of sulfuric acid, carrying out a bromination reaction on o-halo-benzoic acid and NBS in an organic solvent, and after the reaction is finished, carrying out posttreatment to obtain 2-halo-5-bromobenzoic acid. The method has the advantages of being short in reactionroute, simple in operation, environmentally friendly, safe and economical and has a broad application prospect.
Regioselective generation of aryllithiums from substituted bromobenzenes XC6H4Br (X = 4-Br, 4-I, 4-CN, 2-CN)
Lulinski, Sergiusz,Serwatowski, Janusz,Szczerbinska, Magdalena
experimental part, p. 1797 - 1801 (2009/04/04)
Selected activated bromobenzenes XC6H4Br (X = 4-Br, 4-I, 4-CN, 2-CN) were successfully deprotonated with lithium 2,2,6,6-tetramethylpiperidide (LTMP) in THF at -80°C. Thus, 2,5-dibromo-, 2-bromo-5-iodo-, 5-bromo-2-cyano-, and 3-bromo