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设计合成了一种新型咪唑并吩嗪内酰胺荧光传感器分子(S1),通过核磁共振氢谱、碳谱和高分辨质谱等手段对其结构进行了表征,并测定了S1在二甲基亚砜(DMSO)溶液中的荧光光谱,其最大荧光发射波长为524 nm.S1的DMSO溶液具有亮黄色荧光.当在S1的DMSO溶液中分别加入F~-,Cl~-,Br~-,I~-,AcO~-,H_2PO_4~-,HSO_4~-,ClO_4~-和SCN~-等阴离子后,发现只有CN~-的加入使S1的荧光光谱出现明显的下降并发生红移.其溶液荧光颜色由黄色变为橘红色,说明S1对CN~-具有良好的专一选择性.抗干扰实验结果表明,这一识别过程不受其它阴离子干扰.通过计算得到,S1对CN-的荧光光谱最低检测限为9.96×10~(-7)mol/L,这一数值低于世界卫生组织所规定的饮用水中氰离子含量.机理研究表明,S1是一种反应型识别CN~-的荧光传感器.此外,将S1负载于固态硅胶之上,制备成固体CN~-识别材料,并成功用于对固体NaCN的识别和对CN~-水溶液的检测.
A novel imidazo phenazine lactam fluorescence sensor molecule (S1) was designed and synthesized. Its structure was characterized by 1H-NMR, GC and HRMS. The effect of S1 in dimethylsulfoxide (DMSO) solution, the maximum fluorescence emission wavelength is 524 nm.S1 DMSO solution has a bright yellow fluorescence.When the DMSO solution of S1 were added F ~ -, Cl ~ -, Br ~ -, I ~ After the addition of CN ~ -, AcO ~ -, H_2PO_4 ~ -, HSO_4 ~ -, ClO_4 ~ - and SCN ~ - ions were found to decrease the fluorescence spectrum of S1 and redshift. From yellow to orange, it shows that S1 has good selectivity to CN ~ - and the results of anti-interference experiments show that this recognition process is not disturbed by other anions.It is calculated that S1 has the lowest fluorescence spectrum of CN- The limit value is 9.96 × 10 ~ (-7) mol / L, which is lower than the content of cyanide in drinking water regulated by the World Health Organization.The mechanism study shows that S1 is a kind of fluorescent CN sensor. In addition, S1 was loaded on solid silica gel to prepare a solid CN ~ - recognition material and was successfully used to identify solid NaCN and CN ~ - Detection of aqueous solution.