双Schiff碱仲胺荧光探针的合成及其对Mn^(2+)的识别研究  

Synthesis and fluorescent sensing properties for Mn^(2+) ions of di-Schiff base amine fluorescent probe

作　　者：蔡丽华 吴奇 严康 张超博 赵进秋 CAI Li-hua;WU Qi;YAN Kang;ZHANG Chao-bo;ZHAO Jin-qiu(Environmental and Biological Engineering College,Wuhan Technology and Business University,Wuhan 430065,China)

机构地区：[1]武汉工商学院环境与生物工程学院,湖北武汉430065

出　　处：《化学研究与应用》2021年第8期1502-1507,共6页Chemical Research and Application

基　　金：湖北省教育厅科研计划基金项目(B2016338)资助。

摘　　要：以2,6-吡啶二甲酸、乙二胺、对羟基苯甲醛等为原料,经缩合反应,还原反应,设计合成了双Schiff碱仲胺配体荧光探针(L),并通过IR、UV、1H NMR、MS等对其结构进行了表征。考察了其荧光光谱特性、与数种常见金属离子的选择性,结果表明:荧光探针(L)对金属Mn2+离子的响应最好,荧光强度增强最多。探针L的荧光强度与Mn2+浓度呈现良好的线性关系,相关系数为R^(2)=0.99826,检出限为1.2620×10^(-6) mol·L^(-1),通过络合比实验表明荧光探针L与Mn2+离子的最佳络合比1∶1,络合常数为3.2436×10^(7)(mol·L^(-1))-1,以期应用于微量Mn^(2+)的检测。A fluorescent probe( L )of bis Schiff base secondary amine ligand was designed and synthesized from 2,6-pyridine-dicarboxylic acid,ethylenediamine and p -hydroxybenzaldehyde by condensation reaction and reduction reaction.The structure was confirmed by means of IR,UV, 1H NMR and MS.The research of fluorescence spectroscopy indicated that the probe L exhibited high selectivity for Mn 2+ .The spectroscopic titration indicated that a good linear work curve with R^(2)=0.998 26,the stoichiometry of the Mn complex was 1∶1,the minimum detection limits for Mn 2+ was 1.262 0×10^( -6) mol·L^( -1) and the binding constant of L to Mn 2+ was estimated as 3.243 6×10 7(mol·L^( -1) ) -1 .It was expected to be applied to the detection of trace Mn 2+ .

关 键 词：Schiff碱仲胺 Mn^(2+) 离子识别 荧光光谱 

分 类 号：O627.41[理学—有机化学]