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设计合成了荧光受体分子1-(2-取代基苯亚甲基)-4-苯基氨基脲(1;2,取代基=O—CH3;H),采用核磁共振谱和高分辨质谱进行了结构表征.在乙腈中应用吸收光谱、荧光光谱研究了其对金属离子(Zn2+,Cu2+,Pb2+,Cd2+,Hg2+,Ni 2+,Mg2+和Ca2+)的响应.结果发现,受体分子1和2均对Cu2+表现出良好的荧光识别作用,尤其是受体分子2,其荧光增强613倍,检测限达到3.05×10-8 mol/L,对Cu2+表现出较高的选择性和灵敏度,实现了基于荧光增强法识别Cu2+.初步探讨了荧光增强机理.
The fluorescent acceptor molecule 1- (2-substituted benzylidene) -4-phenyl semicarbazide (1; 2, substituent = O-CH3; H) was designed and synthesized and was characterized by NMR and high resolution mass spectrometry The structures of the complexes were characterized by absorbance spectroscopy and fluorescence spectroscopy and their responses to metal ions (Zn2 +, Cu2 +, Pb2 +, Cd2 +, Hg2 +, Ni2 +, Mg2 + and Ca2 + All showed good fluorescence recognition for Cu2 +. Especially for the acceptor molecule 2, the fluorescence was enhanced by 613 times and the detection limit was 3.05 × 10-8 mol / L, which showed high selectivity and sensitivity to Cu2 + Based on the fluorescence enhancement method to identify Cu2 +, the mechanism of fluorescence enhancement was discussed.