A novel dansyl sulfonamide-based fluorescence probe, ( E)-5-( dimethylamino)-N-(4-(2-( quinolin-2-ylmethylene ) hydrazinecarbonyl ) phenyl ) naphthalene-1 -sulfonamide ( DW1 ) was synthesized for detection of Zn2+. UV-Vis, fluorescence and ESI-MS spectra of DW1 were measured to investigate the selective recognition. The results show that the fluorescence intensity increase significantly with high quantum yield ( Φ =0. 32) and blue-shift emission from 545 nm to 515 nm after the coordination of DW1 with Zn2+ , manifesting DW1 could detect Zn2+ sensitively. Moreover, the selective and competitive fluorescent experiments show that DW1 is highly selective for recognition of Zn2+ over other common metal ions. Spectrophotometric titration and ESI-MS spectrum indicate the formation of a 1: 1 DWl-Zn2+ complex and the association constant K was calculated as 1. 75 × 104 (mol/L)-1.%以丹磺酰胺为荧光基团设计合成了新型Zn2+荧光探针DW1(5-(二甲基氨基)-N-(4-(2-(2-喹啉亚甲基)甲酰肼基)苯基)萘-1-磺酰胺).通过紫外光谱、荧光光谱及电喷雾质谱研究了DW1对Zn2+的选择性识别作用.结果表明,DW1与Zn2+结合后荧光显著增强,荧光发射光谱由545nm蓝移至515nm,量子产率达到0.32,且对Zn2具有较高的选择性,受常见离子的干扰较小.光谱滴定和ESI-MS谱表明DW1与Zn2+以1:1的化学计量数形成配合物,平衡常数K=1.75×104(mol/L)-1.
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