Synthesis and Characterization of Un-doped Deep-Blue Organic Light-Emitting Materials Containing Spirofluorene and Biphenyl or Substituted Biphenyl

Abstract

A series of novel blue light-emitting materials, spirofluorene derivatives, DBSF, 3DBSF, and 5DBSF, based on 2′,7′-dibromospiro- [benzo[c]fluorene-7,9′-fluorene] (DBrSPFF) were successfully synthesized and identified by IR, ¹H-NMR, and¹³C-NMR, MS. Optical properties were examined by UV-Vis absorption spectra and photoluminescence (PL) emission spectra. They performed great blue light characteristics. PL quantum yield was calculated by using quinine sulphate in 0.1M H₂SO₄ as standard. Electro-chemical behavior was examined through cyclic voltammeter measurement. They may be potential promising blue light-emitting materials for OLED.

Key Words:

• cyclic voltammeter
• deep-blue organic light-emitting
• PL quantum yield
• spirofluorene
• synthesis

Acknowledgments

This research was supported by the National Nature Science Foundation of China under grant 60736042, Science and Technology of Hubei Provincial Department of Education under grant 20091801, and Wuhan Science and Technology Bureau under grant 200910321102. We also thank Wuhan Polytechnic University Analytical and Testing Centre.