The 19 isomers of azafullerenes C 75 N + were studied with series of INDO methods. It was shown that the isomer in which the carbon atom near C 2(x) is substituted by the nitrogen atom is the most stable one. The nitr...The 19 isomers of azafullerenes C 75 N + were studied with series of INDO methods. It was shown that the isomer in which the carbon atom near C 2(x) is substituted by the nitrogen atom is the most stable one. The nitrogen atom has negative charge and may become a further center for reaction. The bands of the UV spectra of C 75 N + will be red shifted to 700-850 nm compared with those of C 76 . The nature of transition was assigned and the reason of red shift was also rationalized.展开更多
在胶束电动色谱模式下考察并优化了苯胺、邻甲苯胺、间甲苯胺和对甲苯胺4种芳香胺化合物分离的电泳条件(包括缓冲溶液的体系、浓度、pH值、表面活性剂的浓度以及分离电压和分离温度等),实现了苯胺和甲基苯胺异构体在6 m in内的快速基线...在胶束电动色谱模式下考察并优化了苯胺、邻甲苯胺、间甲苯胺和对甲苯胺4种芳香胺化合物分离的电泳条件(包括缓冲溶液的体系、浓度、pH值、表面活性剂的浓度以及分离电压和分离温度等),实现了苯胺和甲基苯胺异构体在6 m in内的快速基线分离。在最优化条件下,对各种芳香胺的线性、检出限和重复性进行了考察。结果表明,所建立的方法简单快速,重复性好。展开更多
文摘The 19 isomers of azafullerenes C 75 N + were studied with series of INDO methods. It was shown that the isomer in which the carbon atom near C 2(x) is substituted by the nitrogen atom is the most stable one. The nitrogen atom has negative charge and may become a further center for reaction. The bands of the UV spectra of C 75 N + will be red shifted to 700-850 nm compared with those of C 76 . The nature of transition was assigned and the reason of red shift was also rationalized.
文摘在胶束电动色谱模式下考察并优化了苯胺、邻甲苯胺、间甲苯胺和对甲苯胺4种芳香胺化合物分离的电泳条件(包括缓冲溶液的体系、浓度、pH值、表面活性剂的浓度以及分离电压和分离温度等),实现了苯胺和甲基苯胺异构体在6 m in内的快速基线分离。在最优化条件下,对各种芳香胺的线性、检出限和重复性进行了考察。结果表明,所建立的方法简单快速,重复性好。
