Synthesis and photophysical properties of highly emissive compounds containing a dibenzosilole core
作者:Liangchun Li、Caihong Xu、Shuhong Li
DOI:10.1016/j.tetlet.2009.11.074
日期:2010.1
A series of new rigid rod-like molecules consisting of a dibenzosilole core, ethynylene linkages, and different aryl end-groups has been synthesized by palladium-catalyzed Sonogashira cross-coupling reactions. These compounds exhibit intense blue to green emissions with high quantum efficiencies and good thermal stabilities.
A facile synthetic route was developed to fuse furan rings to a dibenzosilole core for the construction of difurobenzosilolederivatives through an electrophilic double cyclization reaction. Only silafluorene derivatives with electron-donating groups on the periphery participated in this cyclization. Suzuki–Miyaura coupling and deiodination of the diiododifurobenzosiloles resulted in highly emissive
开发了一种简便的合成路线,将呋喃环与二苯并硅氧烷核融合,通过亲电双环化反应构建二呋喃苯并硅氧烷衍生物。只有在外围具有给电子基团的硅芴衍生物参与了这种环化。Suzuki-Miyaura 偶联和二碘二呋喃苯并硅烷的脱碘导致高发射硅桥联二苯并呋喃化合物。这些获得的化合物表现出非常高的发光量子产率(93%至约99%)和良好的热稳定性。具有边缘苯基的硅桥连二苯并呋喃化合物的单晶很容易生长,并通过单晶 X 射线衍射进行分析,