作者:Volker Schmitt、Sebastian Moschel、Heiner Detert
DOI:10.1002/ejoc.201300463
日期:2013.9
Diaryldimethylpyrazines are the starting materials for the synthesis of C2-symmetric donor- or acceptor-substituted distyrylpyrazines. The optical properties of these cruciform-shaped dyes are dominated by the distyrylpyrazine units; the photophysics is controlled by the styryl substitution, the diaryl substituents on the central pyrazine only having a small effect. Protonation occurs on the pyrazine
二芳基二甲基吡嗪是合成 C2 对称供体或受体取代的二苯乙烯基吡嗪的起始材料。这些十字形染料的光学性质主要由二苯乙烯基吡嗪单元决定;光物理受苯乙烯基取代控制,中心吡嗪上的二芳基取代基仅具有很小的影响。吡嗪和/或侧链胺或吖嗪发生质子化,从而改变吸收和发射特性。浅色和红色以及荧光猝灭取决于末端取代基的性质。这一点,以及荧光的显着正溶剂化变色,允许对环境的 pH 值和极性进行光学传感。