dimethylamino)phenyl]ethenyl pyridine N-oxide was synthesized . Electrochemical properties of this new hemicyanine dye were studied by means of cyclic voltammetry and in situ spectrochemistry. The result shows that th...dimethylamino)phenyl]ethenyl pyridine N-oxide was synthesized . Electrochemical properties of this new hemicyanine dye were studied by means of cyclic voltammetry and in situ spectrochemistry. The result shows that the hemicyanine dye has electrochemical characteristics. In this paper, we report the determination of the reductive peaks.展开更多
A series of novel hemicyanine dye-β-cyclodextrin compounds： mono-6-deoxy-β-cyclodextrin-6-[p-（p-substituted styryl）pyridium] p-totylfulfonates were synthesized by the condensation of mono-6-deoxy-β- cyclodextrin...A series of novel hemicyanine dye-β-cyclodextrin compounds： mono-6-deoxy-β-cyclodextrin-6-[p-（p-substituted styryl）pyridium] p-totylfulfonates were synthesized by the condensation of mono-6-deoxy-β- cyclodextrin-6-（p-methyl pyridinium） p-toluenesulfonate with （un）substituted benzaldehydes. Their structures were established by 1^H NMR, IR, UV-Vis and elemental analysis. The absorption and fluorescence properties of the novel compounds were measured in solution and the photostability of a selected hemicyanine dye-β-cyclodextrin compound was also investigated.展开更多
通过Knoevenagel缩合反应合成了探针分子1,探针分子1的结构用1 H NMR进行了表征。通过紫外-可见光谱及荧光光谱研究了探针分子1检测CN^(-)的能力,结果显示,向探针1的二甲基亚砜(DMSO)-H2O(95∶5,V∶V)磷酸缓冲盐溶液体系(PBS,pH=7.4)中...通过Knoevenagel缩合反应合成了探针分子1,探针分子1的结构用1 H NMR进行了表征。通过紫外-可见光谱及荧光光谱研究了探针分子1检测CN^(-)的能力,结果显示,向探针1的二甲基亚砜(DMSO)-H2O(95∶5,V∶V)磷酸缓冲盐溶液体系(PBS,pH=7.4)中加入Na^(+)、Ca^(2+)、Mg^(2+)、F^(-)、Cl^(-)、Br^(-)、I^(-)、AcO^(-)、H_(2)PO_(4)^(-)、NO_(3)^(-)、NO_(2)^(-)和CN^(-)后,仅CN^(-)可使探针1溶液的颜色由蓝色变为黄色,吸收光谱发生明显的变化(不受其他分析物的干扰)。探针1识别CN^(-)非常迅速,能够在较宽的pH范围内进行检测。在荧光滴定光谱中,探针1检测CN^(-)的检出限为0.14μmol/L,低于饮用水中CN^(-)的极限质量浓度(1.9μmol/L),表明探针1可用于环境和食品样品中CN^(-)的定性、定量检测。同时,基于探针1制备了CN^(-)快速检测试纸,该试纸被成功地应用于自来水样品和添加氰化物食品(辣白菜)中的现场快速检测。展开更多
文摘dimethylamino)phenyl]ethenyl pyridine N-oxide was synthesized . Electrochemical properties of this new hemicyanine dye were studied by means of cyclic voltammetry and in situ spectrochemistry. The result shows that the hemicyanine dye has electrochemical characteristics. In this paper, we report the determination of the reductive peaks.
基金supported by the National Natural Science Foundation of China(21465021,21463023)Key Project of Ministry of Education,China(211189)+1 种基金Natural Science Foundation of Gansu Province,China(1208RJZE139)Program of Gansu Provincial University for Leaders of Disciplines in Science,China(11zx-04)~~
基金Project supported by the Natural Science Foundation of Shaanxi Province （No. 2004B23） and the Science Research Startup Foundation of Northwest University.
文摘A series of novel hemicyanine dye-β-cyclodextrin compounds： mono-6-deoxy-β-cyclodextrin-6-[p-（p-substituted styryl）pyridium] p-totylfulfonates were synthesized by the condensation of mono-6-deoxy-β- cyclodextrin-6-（p-methyl pyridinium） p-toluenesulfonate with （un）substituted benzaldehydes. Their structures were established by 1^H NMR, IR, UV-Vis and elemental analysis. The absorption and fluorescence properties of the novel compounds were measured in solution and the photostability of a selected hemicyanine dye-β-cyclodextrin compound was also investigated.
文摘通过Knoevenagel缩合反应合成了探针分子1,探针分子1的结构用1 H NMR进行了表征。通过紫外-可见光谱及荧光光谱研究了探针分子1检测CN^(-)的能力,结果显示,向探针1的二甲基亚砜(DMSO)-H2O(95∶5,V∶V)磷酸缓冲盐溶液体系(PBS,pH=7.4)中加入Na^(+)、Ca^(2+)、Mg^(2+)、F^(-)、Cl^(-)、Br^(-)、I^(-)、AcO^(-)、H_(2)PO_(4)^(-)、NO_(3)^(-)、NO_(2)^(-)和CN^(-)后,仅CN^(-)可使探针1溶液的颜色由蓝色变为黄色,吸收光谱发生明显的变化(不受其他分析物的干扰)。探针1识别CN^(-)非常迅速,能够在较宽的pH范围内进行检测。在荧光滴定光谱中,探针1检测CN^(-)的检出限为0.14μmol/L,低于饮用水中CN^(-)的极限质量浓度(1.9μmol/L),表明探针1可用于环境和食品样品中CN^(-)的定性、定量检测。同时,基于探针1制备了CN^(-)快速检测试纸,该试纸被成功地应用于自来水样品和添加氰化物食品(辣白菜)中的现场快速检测。
