A novel Pd-catalyzed C-H functionalization reaction was developed to construct a quaternary carbon center with high yield. This reaction provides an efficient method for the synthesis of 9,9'-diarylfluorenes by direct arylation of monoarylfluorene.
Pure aromatic hydrocarbons with rigid and bulky substituents as bipolar hosts for blue phosphorescent OLEDs
Four pure hydrocarbons were synthesized and employed as hosts for blue-PhOLEDs. With almost the same bandgap/triplet-energy, their device performances are different.