Four novel gemini quaternary ammonium surfactants containing DSD acid-triazine structure were synthesized using a facile three-step synthetic route , from 4,4'-diamino-2,2'-disulfonic-stilbene (DSD acid), cyan...Four novel gemini quaternary ammonium surfactants containing DSD acid-triazine structure were synthesized using a facile three-step synthetic route , from 4,4'-diamino-2,2'-disulfonic-stilbene (DSD acid), cyanuric chloride and dimethyl dodecylamine. The structures and optical properties of compounds (6a-d) were characterized by Fourier-Transform infrared (FT-IR) spectroscopy, UV-visible absorption spectra and fluorescence emission spectrum. The surface tension and the Critical Micelle Concentration (CMC) were evaluated. The result shows that the four compounds at lower concentrations can greatly reduce the surface tension of aqueous solutions. The spectroscopic properties of? these quaternary ammonium salts are assessed for their effectiveness and potential as fluorescent brightening agents.展开更多
以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H N...以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H NMR)对目标化合物进行结构表征,并对荧光性能、增白效果、色度指数、表面活性和表面整理作用进行了测试。结果表明:DSD酸-三嗪-四辛基双季铵盐荧光增白剂具有较强的荧光发射性能;对滤纸进行染色增白处理后,白度值由84.58增加至124.81,且滤纸外观更加光滑平整;目标化合物具有表面活性作用,使水溶液的临界胶束浓度为7.68×10^(-3 )mol/L,表面张力为30.81 mN/m。展开更多
文摘Four novel gemini quaternary ammonium surfactants containing DSD acid-triazine structure were synthesized using a facile three-step synthetic route , from 4,4'-diamino-2,2'-disulfonic-stilbene (DSD acid), cyanuric chloride and dimethyl dodecylamine. The structures and optical properties of compounds (6a-d) were characterized by Fourier-Transform infrared (FT-IR) spectroscopy, UV-visible absorption spectra and fluorescence emission spectrum. The surface tension and the Critical Micelle Concentration (CMC) were evaluated. The result shows that the four compounds at lower concentrations can greatly reduce the surface tension of aqueous solutions. The spectroscopic properties of? these quaternary ammonium salts are assessed for their effectiveness and potential as fluorescent brightening agents.
文摘以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H NMR)对目标化合物进行结构表征,并对荧光性能、增白效果、色度指数、表面活性和表面整理作用进行了测试。结果表明:DSD酸-三嗪-四辛基双季铵盐荧光增白剂具有较强的荧光发射性能;对滤纸进行染色增白处理后,白度值由84.58增加至124.81,且滤纸外观更加光滑平整;目标化合物具有表面活性作用,使水溶液的临界胶束浓度为7.68×10^(-3 )mol/L,表面张力为30.81 mN/m。