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首页> 中文期刊> 《无机化学学报》 >一种同时分辨识别Zn2+和F-离子的双功能探针

一种同时分辨识别Zn2+和F-离子的双功能探针

         
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The probe 1 was readily prepared via condensation of 8-formyl-7-hydroxy-coumarin and carbonic dihydrazide in a one-step procedure.Probe 1 exhibited high sensitivity and selectivity towards Zn2+ and F-through a "turn-on" fluorescence response and/or ratiometric colorimetric response with low detection limits of the order of 10-s mol ·L-1.The complex behaviour was fully investigated by spectral titration,isothermal titration calorimetry,1H NMR spectroscopic titration and mass spectrometry.Interestingly,probe 1 not only recognizes the cation Zn2+ and the anion F-,but can also distinguish between these two ions via the max wavelength in their UV-Vis spectra (360 nm for 1-Zn2+ vs 400 nm for 1-F-complex) or their fluorescent spectra (λex,λem=360,454 nm for 1-Zn2+ vs λex,λem=400,475 nm for 1-F-complex) due to their differing red-shifts.Additionally,probe 1 has been further explored in the detection of Zn2+ in living cells.%由8-甲酰基-7-羟基香豆素与碳酰肼经一步缩合反应可制得探针1.研究发现,探针1对Zn2+和F-离子均呈现荧光增强和比率比色的高灵敏和高选择性响应,检出限低至10-8 mol.L-1.通过光谱、ITC、1H NMR滴定及质谱分析,详细地研究了探针与离子形成的配合物性质.在不同的介质中,探针不仅同时表现出对金属阳离子Zn2+和对阴离子F-的识别,而且吸收和发射波长均有显著的差异:1-Zn2+配合物的最大吸收波长为360 nm,而1-F-配合物为400 nm;1-Zn2+配合物的荧光激发和发射波长分别为360和454 nm,而1-F-配合物分别为400和475 nm.此外,探针1还能应用于活体PC3细胞中Zn2+的荧光成像.

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