磷光配体3-[4-(2-吡啶基)苯基]-9-(4-氟苯基)-9H-咔唑的合成

以对溴苯胺为原料,经重氮化、Gomberg-Bachmann偶联、硼酸化反应得到4-(2-吡啶基)苯硼酸;再与对氟苯基取代的咔唑,通过四(三苯基磷)钯催化,于90℃进行Suzuki偶联合成出标题磷光配体,收率82.03%。对目标物用核磁共振氢谱和元素分析进行了表征,并测得它在二氯甲烷中的紫外吸收光谱和荧光光谱。由于受咔唑基团的影响,磷光配体最大吸收峰波长红移56 nm,且吸收的强度增加,Stokes位移154 nm,相对荧光量子效率为0.17。

Synthesis of 3-[4-(Pyridin-2-y1)phenyl]-9-(4-fluorophenyl)-9H-carbazole

4-(Pyndin-2-yl)phenylboronic acid Was synthesized by diazotization. the Gomberg-Bachmann coupling, boronic acidification reactions from 4-bromoaniline.Then.the phosphorescent ligand was synthesized by the Suzuki coupling reaction of 4-(pyridin-2-yl)phenylboronic acid with carbazole substituted by 4-fluorophenyl group using Tetrakis(triphenylphosphine)palladium as catalyst at 90℃ with a yield of 82.03%.It was characterized by ~1HNMR and EA. and its UV-vis absorption and PL emission spectrum was tested. The results of spectrum show that the max absorbance played a red shift of 56 nm, the Stokes shift of 154 nm, and its intensity enhanced as the efffect of carbazolyl group.