氰基联苯-杂冠醚类荧光探针及其检测Al^(3+)性质研究

Fluorescent Sensor Based on Cyanobiphenyl-Heterocrown Ether and the Properties of Al^(3+) Detection

以双(2-氯乙基)氨基甲酸叔丁酯、2,2-(乙烷-1,2-二丁基(氧基))二乙硫醇和氰基联苯等为起始原料,设计合成了一种新型的荧光探针(HCP)。该分子经^(1)H-NMR,^(13) C-NMR及高分辨质谱进行了结构表征。随后在V(乙腈)∶V(水)=5∶1溶液中,通过紫外和荧光光谱发现探针HCP对Al^(3+)具有比率型的选择性识别,有较高的选择性和抗干扰能力,工作曲线法证明其以1∶1的比例与Al^(3+)络合,并通过计算得到了络合常数Ka为1.47×10^(5) mol/L,检测限为3.06×10^(-6) mol/L。

A novel fluorescent sensor(HCP)was designed and synthesized from t-butyl bis(2-chloroethyl)carbamate,2,2'-(ethane-1,2-diylbis(oxy))diethanethiol and 4'-hydroxy-[1,1'-biphenyl]-4-carbonitrile.The structure of the molecule was characterized by ^(1)H-NMR,^(13) C-NMR and high resolution mass spectrometry.The selectivity of sensor HCP with Al^(3+) was investigated by UV absorbance spectroscopy and fluorescence spectroscopy in CH 3CN/water solution.Job’s plot mehtod proved that the binding ratio for HCP to Ag+was 1∶1.The binding constant Ka was 1.47×10^(5) mol/L and the detection limit was 3.06×10^(-6) mol/L.