Luminescent meterials have a major technological role for human kind in the form of application such as organic and inorganic light emitters for flat panel and flexible displays such as plasma displays, LCD displays and OLED displays. To develop a luminescent material with high colour purity, luminous efficiency and stability, we synthesized diketone by carbonylative Suzuki coupling in the presence of Pd(NHC) (NHC = N-heterocyclic carbene) complex as the catalyst. Carbonylative coupling of 4,42-diiodobiphenyl and phenylboronic acid was investigated to study in detail the catalytic ability of the Pd(NHC) complex. Reactions were carried out using both CO and metal carbonyls. Bis-(1,3-dihydro-1,3-dimethyl-2H-imidazol-2-ylidene) diiodo palladium was used as the catalytic complex. Reaction products biphenyl-4,4-diyl bis(phenyl methanone) 3 and (4-iodobiphenyl-4-yl)(phenyl)methanone 4 were obtained as a result of CO insertion into the palladium(II)-aryl bond. However, when pyridine-4-yl boronic acid was used in place of phenylboronic acid as the starting reagent, synthetic reaction yielding 3 and 4 were found not to occur.
发光材料以有机和无机发光体的形式应用于平板显示器和柔性显示器(如等离子显示器、液晶显示器和有机发光二极管显示器),在人类科技领域发挥着重要作用。为了开发一种具有高色纯、高发光效率和高稳定性的
发光材料,我们以 Pd(NHC)(NHC = N-杂环碳烯)络合物为催化剂,通过羰基化铃木偶联合成了二酮。为了详细研究
钯(NHC)络合物的催化能力,我们研究了 4,42-二
碘联苯和苯
硼酸的羰基偶联。反应同时使用了 CO 和
金属羰基。双(1,3-二氢-
1,3-二甲基-2H-咪唑-2-亚基)二
碘钯被用作催化络合物。由于 CO 插入
钯(II)-芳基键,得到了反应产物
联苯-4,4-二基双(苯基甲酮)3 和(
4-碘联苯-4-基)(苯基)甲酮 4。然而,当用
吡啶-4-基
硼酸代替苯
硼酸作为起始试剂时,发现并没有发生合成反应生成 3 和 4。