新型罗丹明B类荧光探针的合成及其对Fe^(3+)识别研究

Synthesis of Novel Rhodamine B Fluorescent Probe and Recognition Study to Fe^(3+)

以罗丹明B和间氨基吡啶缩合反应得到新型罗丹明B衍生物L1,并用1H NMR,IR,HRMS-ESI及X射线对其结构进行了确证.通过荧光光谱法研究了目标物L1在水溶液中与金属离子的识别特性.结果表明目标物L1作为荧光探针可选择性的比色识别Fe3+,并且受常见离子的干扰较小.探针L1的荧光强度与Fe3+浓度(1×10-6~9×10-6 mol/L)呈较好的线性关系.

A novel rhodamine B derivative L1 was synthesized facilely by the condensation reaction of rhodamine B hydrazide and 3-aminopyridine, and its structure was characterized by 1H NMR, IR, HRMS-ESI and X-ray techniques. The recognition properties of the target compound L1 with metal ions had been investigated in water solution by the fuorescence spectrophotometry. The results showed that the probe LI exhibited the selective colorimetric recognition to Fe3＋than other metal ions. When the concentration of Fe3＋ was in the range of 1×10-6～9×10-6mol/L, there was a good linearity between the fluorescence intensity of the probe LI and the concentration of Fe3＋.