ORGANIC ELECTROLUMINESCENCE ELEMENT, IMAGE DISPLAY DEVICE, AND IMAGING APPARATUS
申请人:Iwawaki Hironobu
公开号:US20100059739A1
公开(公告)日:2010-03-11
An organic electroluminescence element includes organic compound layers disposed between electrodes, the concentration of halogen atoms contained in organic compounds of the organic compound layers being 1 ppm or less according to combustion ion chromatography.
Fluorescence Enhancement of Pyrene Chromophores Induced by Alkyl Groups through σ–π Conjugation: Systematic Synthesis of Primary, Secondary, and Tertiary Alkylated Pyrenes at the 1, 3, 6, and 8 Positions and Their Photophysical Properties
We have systematically synthesized 1-, 3-, 6-, and 8-alkyl-substituted pyrene derivatives using the latest synthesis methods and investigated the effects of alkyl substitution on the photophysical properties of the pyrene chromophore. Like the trimethylsilyl group, which is known to enhance the fluorescence properties of some chromophores through sigma*-pi* conjugation, alkyl groups (primary, secondary, and tertiary) enhanced the fluorescence quantum yield of the pyrene chromophore through sigma-pi conjugation in most cases. While these enhancements in the fluorescence quantum yield were beyond expectations, the results were supported by absolute measurements. These results also indicate that ubiquitous alkyl groups can be used to tune the photophysical properties of the pyrene chromophore, as well as to improve the solubility or prevent aggregation. In other words, they can be used to develop new photofunctional materials.
Hansen,P.E. et al., Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1976, vol. 30, p. 267 - 270
作者:Hansen,P.E. et al.
DOI:——
日期:——
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