N-Methylquinolinium derivatives for photonic applications: Enhancement of electron-withdrawing character beyond that of the widely-used N-methylpyridinium
作者:Jae-Hyeok Jeong、Ji-Soo Kim、Jochen Campo、Seung-Heon Lee、Woo-Yong Jeon、Wim Wenseleers、Mojca Jazbinsek、Hoseop Yun、O-Pil Kwon
DOI:10.1016/j.dyepig.2014.07.016
日期:2015.2
styryl quinolinium push–pull chromophores have been designed and synthesized in order to examine the electron-withdrawing strength of various quinolinium electron acceptor groups, and their influence on the photophysical properties and in particular on the second-order nonlinear optical response. The static molecular first hyperpolarizabilities measured by long-wavelength hyper-Rayleigh scattering are
为了研究各种喹啉电子受体基团的吸电子强度及其对光物理性质的影响,特别是对二阶非线性光学的影响,设计并合成了一系列π共轭苯乙烯基喹啉鎓推挽生色团。回复。发现通过长波超瑞利散射测量的静态分子第一超极化率遵循由NMR分析确定的其受体基团的吸电子强度的顺序。基于最强电子受体基团(1,2-和1,4-二甲基喹啉鎓)的喹啉鎓发色团显示出非常大的233和256×10 -30的第一超极化率 分别高于著名的和广泛使用的吡啶鎓类似物4-甲基苯磺酸的4-(4-(二甲氨基)苯乙烯基)-1-甲基吡啶鎓4-甲基苯磺酸盐的Esu值,其第一超极化率为183×10 -30 esu。与4-(4-(二甲基氨基)苯乙烯基)-1-甲基吡啶-4-甲基苯磺酸盐中使用的二甲基吡啶基相比,二甲基喹啉鎓电子受体基团表现出更高的吸电子强度,因此在光子应用中具有很高的潜力。