White-light emission from single molecular systems has attracted a great deal of attention due to their advantages over multicomponent emitters. Azaheterocyclic push-pull derivatives have been demonstrated to be white emitters by combining neutral and protonated forms in the appropriate ratio, although limited cases of white-light emission have been reported from quinazoline derivatives. Herein, we describe a series of push-pull 4-substituted and 4,7-disubstituted quinazolines that show white photoluminescence both in solution and in the solid state. All of the materials were prepared by straightforward Suzuki–Miyaura cross-coupling reactions and the compounds exhibited remarkable emission solvatochromism. In some cases the presence of acid prompted the appearance of emission bands of complementary colors. Thus, multicolor photoluminescence, including white light, could be finely tuned by the controlled protonation of the electron-deficient quinazoline ring.

单分子系统发出的白光由于其比多组分发射器的优势而备受关注。通过将中性和质子化形式以适当的比例结合，已证明氮杂环杂环推挽衍生物是白色发射体，尽管据报道喹唑啉衍生物的发射白光的情况有限。本文中，我们描述了一系列推挽式4取代和4,7-二取代的喹唑啉，它们在溶液和固态下均显示白色光致发光。所有材料都是通过直接的Suzuki-Miyaura交叉偶联反应制备的，并且这些化合物显示出显着的发射溶剂变色。在某些情况下，酸的存在会促使出现互补色的发光带。因此，多色光致发光