作者:Tinghua Xu、Ran Lu、Ming Jin、Xianping Qiu、Pengchong Xue、Chunyan Bao、Yingying Zhao
DOI:10.1016/j.tetlet.2005.08.012
日期:2005.10
Novel monodisperse linear 3,9-linked oligocarbazoles (OCAs) were prepared stepwise using Ullmann coupling reaction in seal-tubes. The resulting OCAs were soluble in common organic solvents. The UV–vis spectra of OCAs exhibited small red shift and their intensities increased linearly with the increase of the carbazole moieties, suggesting that no intramolecular π-interactions appeared at ⩽8-mer. All
使用Ullmann偶联反应在密封管中逐步制备新型单分散的线性3,9-连接的低碳咔唑(OCA)。所得的OCA可溶于常见的有机溶剂。OCA的UV-vis光谱显示出很小的红移,并且其强度随着咔唑部分的增加而线性增加,这表明在⩽8-mer中没有分子内π相互作用。所有的OCA均发出强荧光,发现当咔唑单元数达到四个时,线性OCA的共轭度将达到饱和。