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Chemical communications (Cambridge, England)

A versatile efficient one-step approach for carbazole-pyridine hybrid molecules: highly efficient host materials for blue phosphorescent OLEDs.


PMID 25500635

Abstract

By using various fluoro-substituted pyridines and carbazole as starting materials, we have synthesized a series of carbazole-pyridine hybrid compounds through an efficient catalyst free C-N coupling reaction with high yields of 85-95%. The bi-, tri- and tetra-carbazole substituted pyridine derivatives exhibit increased thermal stabilities and comparatively high triplet energy levels of ∼3.0 eV. By using them as host materials for blue phosphorescent OLEDs, maximum current efficiencies are achieved ranging from 32-42 cd A(-1).

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900922
2,6-Bis(9H-carbazol-9-yl)pyridine
C29H19N3