Effect of increasing methoxyphenyl substitution on pyrene pyrazoline enduring green light emitting materials
作者:A. Karuppusamy、R. Arulkumar、P. Kannan、P. Venuvanalingam
DOI:10.1016/j.jphotochem.2019.04.003
日期:2019.5
(PP3My) in solution and yellow emission at 580 nm (PP1My), 574 nm (PP2My) and 563 nm (PP3My) in solid state. The blue shift in the emission in solid state was owing to aggregation induced by methoxy substituent. The color chromaticity values were calculated for their color purity of green and yellow emissions. Ten different solvents were used to examine solvatochromism and red shifted emission observed
合成了含有单,二和三甲氧基苯基取代基的吡唑啉衍生物。随着甲氧基苯基的逐步取代,热稳定性和玻璃化转变温度发生变化。X射线衍射图显示了它们的结晶性质。材料的光物理性质在溶液中分别在510 nm(PP1My),510 nm(PP2My)和508 nm(PP3My)发出绿色光,并在580 nm(PP1My),574 nm(PP2My)和563 nm(PP3My)发出黄光。)处于固态。固态发射中的蓝移是由于甲氧基取代基引起的聚集。计算它们的绿色和黄色发射的颜色纯度的色度值。使用十种不同的溶剂检查溶剂变色现象,观察到在增强溶剂极性时观察到红移发射,而环己烷中的双发射则表明导致分子内电荷转移的分子的扭曲构象变为分子内电荷转移的扭曲。当给电子甲氧基时,吡咯啉衍生物的非线性光学性质得到改善,of的多芳族发光体被吡唑啉部分取代。通过Z扫描技术在532 nm处研究了三阶非线性光学性质,并表现出较强的反向饱和吸收