基于二苯甲酮Schiff碱Fe3+荧光分子探针

A Fe3+ Schiff Fluorescence Probe based on Diphenyl Ketone

摘要:

以2,4-二羟基二苯甲酮（UV-0）和邻苯二胺合成了Schiff碱L荧光分子探针，采用FT-IR、HNMR和MS对其结构进行了表征。在V(EtOH):V(HEPES)=95:5 （pH=7.2）缓冲溶液中，L能够通过on-off荧光响应选择性识别Fe3+，且几乎不受其他金属离子的干扰。在Fe3+（0～7.0  10-5 mol/L）浓度范围内，溶液荧光强度与Fe3+浓度呈现良好的线性关系。L对Fe3+检出限为1.9410-7 mol/L，二者的结合常数为2.0104 (mol/L)-1。

Abstract:

In this paper, a Schiff base L was prepared from 2,4-dihydroxyl diphenyl ketone (UV-0) and o-phenylenediamine. It was characterized by FT-IR, 1H NMR and HRMS. In the solution of V(EtOH):V(HEPES)=95:5 at pH 7.2, L displayed an “on-off” recognition ability for Fe3+ with good selectivity and without obvious disturbances by other metal ions. In the concentration range of Fe3+ from 0 to 7.0  10-5 mol/L, the intensity of this solution showed a good linear relationship with the concentration of Fe3+. According to this curve, the detection limit of L for Fe3+ was calculated to be 1.9410-7 mol/L, and the binding constant between them was 2.0104 (mol/L)-1.