A novel fluorescence chemosensor 1 based on （R）-binaphthyl-salen can exhibit highly sensitive and selective recognition responses toward Cu^2＋ by ＂turn-off＂ fluorescence quench type in THF/H20, and Zn^2＋ by ＂tu...A novel fluorescence chemosensor 1 based on （R）-binaphthyl-salen can exhibit highly sensitive and selective recognition responses toward Cu^2＋ by ＂turn-off＂ fluorescence quench type in THF/H20, and Zn^2＋ by ＂turn-on＂ fluorescence enhancement type in CHC13/CH3CN, respectively, suggesting that solvents can dramatically affect the responsive properties of salen-based chemosensor. In addition, Cu^2＋ can lead to the most pronounced changes of CD spectra without the influence of solvents, which indicates this kind chemosensor can also be used as a sole Cu^2＋ probe based on CD spectra.展开更多
邻菲啰啉二酮(1)在醋酸与醋酸铵的作用下与芳香醛通过脱水缩合构筑咪唑环,首次合成了3个新型芳基咪唑化合物(3a^3c).利用IR和1 H NMR等对目标分子3进行了结构表征.首次探究了11种金属离子对目标产物3的荧光猝灭,选取了包括主族和副族的1...邻菲啰啉二酮(1)在醋酸与醋酸铵的作用下与芳香醛通过脱水缩合构筑咪唑环,首次合成了3个新型芳基咪唑化合物(3a^3c).利用IR和1 H NMR等对目标分子3进行了结构表征.首次探究了11种金属离子对目标产物3的荧光猝灭,选取了包括主族和副族的11种金属离子Ca^(2+)、Cr^(3+)、Hg^(2+)、Al^(3+)、Mn^(2+)、Na+、Pb^(2+)、Fe^(3+)、Cu^(2+)、Zn^(2+)、Fe^(2+).通过荧光测试研究了金属离子的荧光猝灭现象,并通过经典的方法计算出了荧光猝灭系数KSV.研究结果表明:Zn^(2+)对配体3a、3b、3c均产生优良的猝灭效果,并产生红移,因此可对Zn^(2+)进行荧光识别.荧光猝灭系数KSV的计算结果表明,金属离子的最低检出限可达10^(-5)mol/L.利用产生荧光猝灭现象可以广泛应用于金属离子荧光探针识别,从而达到检测金属离子的目的.因此,目标产物可作为Zn^(2+)的荧光探针.展开更多
基金the National Natural Science Foundation of China，National Basic Research Program of China，Zhejiang Provincial Natural Science Foundation，the Bureau of Science and Technology of Wenzhou
文摘A novel fluorescence chemosensor 1 based on （R）-binaphthyl-salen can exhibit highly sensitive and selective recognition responses toward Cu^2＋ by ＂turn-off＂ fluorescence quench type in THF/H20, and Zn^2＋ by ＂turn-on＂ fluorescence enhancement type in CHC13/CH3CN, respectively, suggesting that solvents can dramatically affect the responsive properties of salen-based chemosensor. In addition, Cu^2＋ can lead to the most pronounced changes of CD spectra without the influence of solvents, which indicates this kind chemosensor can also be used as a sole Cu^2＋ probe based on CD spectra.
文摘邻菲啰啉二酮(1)在醋酸与醋酸铵的作用下与芳香醛通过脱水缩合构筑咪唑环,首次合成了3个新型芳基咪唑化合物(3a^3c).利用IR和1 H NMR等对目标分子3进行了结构表征.首次探究了11种金属离子对目标产物3的荧光猝灭,选取了包括主族和副族的11种金属离子Ca^(2+)、Cr^(3+)、Hg^(2+)、Al^(3+)、Mn^(2+)、Na+、Pb^(2+)、Fe^(3+)、Cu^(2+)、Zn^(2+)、Fe^(2+).通过荧光测试研究了金属离子的荧光猝灭现象,并通过经典的方法计算出了荧光猝灭系数KSV.研究结果表明:Zn^(2+)对配体3a、3b、3c均产生优良的猝灭效果,并产生红移,因此可对Zn^(2+)进行荧光识别.荧光猝灭系数KSV的计算结果表明,金属离子的最低检出限可达10^(-5)mol/L.利用产生荧光猝灭现象可以广泛应用于金属离子荧光探针识别,从而达到检测金属离子的目的.因此,目标产物可作为Zn^(2+)的荧光探针.
