标题：Synthesis, X-ray crystal structure and optical properties of novel 2-aryl-3-ethoxycarbonyl-4-phenylpyrido[1,2-a]benzimidazoles
作者：Chen, X.;Yang, H.;Ge, Y.;Feng, L.;Jia, J.;Wang, J.
作者机构：[Chen, X] School of Chemistry and Chemical Engineering, Shandong University Shandong, Jinan 250100, Shandong, China;[ Yang, H] School of Chemistry and 更多
通讯作者地址：[Jia, J]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.
来源：Luminescence: The journal of biological and chemical luminescence
摘要：A series of novel 2-aryl-3-ethoxycarbonyl-4-phenylpyrido[1,2-a] benzimidazole derivatives were synthesized by the tandem reaction of 2-benzoyl benzimidazole and (Z)-ethyl 4-bromo-3-arylbut-2-enoate in the presence of potassium carbonate. The compounds were characterized using IR, ~1H-NMR, ~(13)C-NMR, HRMS and the structure of 6f was further determined by X-ray crystallography. Both absorption and fluorescence spectra characteristics of the compounds were investigated in acetonitrile and dichloromethane. The results showed that the absorption maxima of the compounds varied from 220 to 284 nm, depending on the structure of 2-aryl group. The fluorescence results revealed that these compounds exhibited blue-green fluorescence (463-475 nm) in dilute solutions and showed acceptable fluorescence quantum yields (_(PL) = 0.13-0.73) in dichloromethane.