期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 210, 期 2-3, 页码 130-139出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2010.01.006
关键词
Oligofluorenes; Luminescent materials; Cholesteric liquid crystals; Photonic band gap materials; Lasers
资金
- MEC-FEDER Spanish [MAT2008-06522-C02-01, HI2005-0258]
- Government of Aragon
- FEDER
- MIUR (Azioni Integrate Italia-Spagna)
We present the synthesis and characterization of an oligofluorene series whose chemical structure has been tuned to have amorphous nature, compatibility with liquid crystalline matrices and intrinsic chirality. Oligofluorenes are good blue emitters and the emission quantum yield is around 0.8 in the violet-blue range. The prepared materials are suitable for mirror-less laser applications based on a dye-doped liquid crystal resonator. We propose to use fluorene-based compounds to combine two necessary properties to achieve laser emission from cholesteric liquid crystal mixtures: chirality and luminescence. A good intensity emission and a fine tuning of the laser emission are demonstrated. (C) 2010 Elsevier B.V. All rights reserved.
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