Gao Xi-cun
2010
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Journal
Fine chemicals
Abstract
4-(Pyridin-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 effect of carbazolyl group.