Indolocarbazole tetraphenylene compounds are disclosed. These novel compounds contain tetraarylene or tetraheteroarylene which can be used as charge transporting materials, charge blocking materials, hosts or emitters in an organic electroluminescent device. These novel compounds offer better device performance than comparative compounds that don't contain a tetraarylene or tetraheteroarylene structure. Also disclosed are an electroluminescent device and a formulation.
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A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was presented in this study. This approach affords facile access to a range of fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions showcase high yields and enantioselectivities under mild reaction conditions