were obtained by Knoevenagel condensation and palladium-catalyzed cross-coupling reactions starting from commercially available 2-methyl- or 2-chloropyrazine. The optical absorption and emission properties of these chromophores were studied in different solvents. Some proved to be highly emissive and exhibit strong emission solvatochromism, which suggests a highly polar emitting state, characteristic
                                    描述了十八种推拉
吡嗪荧光团。甲氧基、
二甲氨基和二苯
氨基用作给电子基团 (EDG),并使用由多个键和 1,4-亚苯基部分组成的六个 π 共轭系统将 EDG 连接到
吡嗪核心。发色团是通过 Knoevenagel 缩合和
钯催化的交叉偶联反应获得的,起始于市售的 2-甲基-或 
2-氯吡嗪。在不同溶剂中研究了这些发色团的光吸收和发射特性。一些被证明具有高发射性并表现出强烈的发射溶剂化变色,这表明具有高度极性的发射状态,这是经历分子内电荷转移 (ICT) 的化合物的特征。