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以5-氯-2-氨基苯甲酸和邻苯二胺为原料,经两步缩合反应,合成了目标化合物,6-氯-2-[5-氯-2-(4-对甲苯磺酰胺基)]苯基-[3,4]-苯并咪唑-[1,3]-喹唑啉(化合物B)。通过核磁共振氢谱(1 H-NMR)、质谱(MS)、傅里叶变换红外光谱(FT-IR)和元素分析确定了目标化合物的结构。借助紫外-可见吸收光谱、荧光光谱和热重分析研究了它的光学和热学性能。结果表明,目标化合物在紫外光激发下显示出很强的绿色荧光发射能力,同时具有很大的斯托克斯位移(Stokes Shift)和良好的光、热稳定性,有望在荧光防伪技术中得到潜在应用。
The target compound, 6-chloro-2- [5-chloro-2- (4-p-toluenesulfonamide) was synthesized from 5-chloro-2-aminobenzoic acid and o-phenylenediamine by two steps of condensation reaction )] Phenyl- [3,4] -benzimidazol- [l, 3] -quinazoline (Compound B). The structure of the target compound was confirmed by 1 H-NMR, MS, FT-IR and elemental analysis. Its optical and thermal properties were studied by UV-Vis absorption spectra, fluorescence spectra and thermogravimetric analysis. The results show that the target compound shows strong green fluorescence emission under ultraviolet light excitation, and has a large Stokes Shift and good light and thermal stability, and is expected to be obtained in the anti-counterfeiting technology of fluorescence Potential applications.