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Communication | Regular issue | Vol 71, No. 4, 2007, pp.799-804
Published online, 13th February, 2007
DOI: 10.3987/COM-06-10983
Synthesis and Electron-Transporting Ability of 3,6-Diaryl-4,5-diazafluorenes Modified Using Direct Arylation

Katsuhiko Ono,* Kyohei Nagano, Michitaka Suto, and Katsuhiro Saito

*Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan

Abstract

A modification of 4,5-diazafluorene by using direct arylation was performed in order to synthesize a new type of electron-transporting materials in the study of organic electroluminescent (EL) devices. The title compounds possessed high glass transition temperatures over 100 °C. The phosphorescent EL performance was improved by the increasing electron-transporting ability arising from the extension of the π-electron system.