【摘要】 基于罗丹明结构设计合成了一种新型Schiff碱类荧光探针。随着Fe³⁺的加入,探针溶液表现出明显的荧光增强,该现象表明探针和Fe³⁺络合能力较强,避免了因Fe³⁺自身磁性引起的荧光猝灭。探针在识别Fe³⁺时,表现出很好的选择性,并且识别过程不受其他常见干扰离子的影响。进一步,通过job’s曲线和高斯理论计算对探针的识别机理进行了较深入的探究,得到探针与Fe³⁺按照1∶1络合的结论,并提出了可能的络合位点和识别过程。更多还原

【Abstract】 A new fluorescent probe based on rhodamine was designed and synthesized.Upon addition of Fe³⁺,the probe exhibited selective fluorescence enhancement behavior,which indicated that the probe effectively avoided the fluorescence quenching for the paramagnetic nature of Fe³⁺via its strong binding capability toward Fe³⁺. Further,the competing experiment showed that the probe will not be interfered by other common metal ions.What’s more,the recognition mechanism was also investigated and proposed as that the probe complexed Fe³⁺via a 1 ∶ 1 special binding mode by the job’s plots and the DFT quantum calculations.更多还原