一种Salen型荧光探针对镁(Ⅱ)离子的选择性识别  

A Salen-type Fluorescent Probe to Selectively Identify Mg(Ⅱ)

作　　者：董静[1] 于洁[2] 冯素玲[1] 王爱军[1] 

机构地区：[1]河南师范大学化学与环境科学学院绿色化学介质与反应省部共建教育部重点实验室,河南新乡453007 [2]新乡医学院化学教研室,河南新乡453003

出　　处：《发光学报》2012年第6期669-673,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(20772025)资助项目

摘　　要：研究了Salen类型的荧光探针N,N'-二(2-羟基-1-萘甲醛)-l,2-苯二胺(NAPPDIH)对Mg2+的选择性响应。荧光和紫外光谱滴定实验显示NAPPDIH与Mg2+能够以1∶1的化学计量比形成配合物。NAPPDIH与Mg2+结合后,溶液的荧光强度显著增强,紫外可见吸收光谱红移,肉眼可观测到溶液的浅黄色迅速加深。与其他金属离子相比,Mg2+显示唯一的荧光增强。此外,在3.0×10-6～5.0×10-5mol.L-1范围内,Mg2+的浓度与荧光强度呈良好的线性关系。因此,NAPPDIH可用于Mg2+的快速检测。The selective responding of Salen-type fluorescent probe, N, N＇-bis（2-hydroxy-1- naphth- aldehyde）-l,2-phenylenediimine（NAPPDIH） to Mg2＋ was studied. The fluorescence and UV/Vis titration experiments indicated that NAPPDIH bound Mg2＋ at the molar ratio of 1： 1. With the binding of NAPPDIH to Mg2＋ , the fluorescence spectra exhibited a specific enhancement, the UV-Vis absorption exhibited a red shift, and a naked eye color varied from pale yellow to deep yellow. The influence of other metal cations on the fluorescent spectra of NAPPDIH was investigated, the results showed that the fluorescence intensity of NAPPDIH could be greatly increased only by Mg2 ＋ ion. Besides, a good linearity between the enhanced fluorescence intensity and the concentration of Mg2＋ from 3.0× 10 -6 moL/L to 5.0 × 10 -5 mol/L was established. NAPPDIH was predicted as a fluorescent probe to rapidly detect Mg2＋.

关 键 词：N N'-二(2-羟基-1-萘甲醛)-l 2-苯二胺 Mg2+ 荧光光谱 紫外-可见吸收光谱 

分 类 号：O657.3[理学—分析化学]