Dipyrrolylquinoxaline-bridged hydrazones: a new class of chemosensors for copper(II)

被引：8
作者：
Guo, Qian-ni [1 ]
Zhong, Cheng [1 ]
Lu, Yun-guo [1 ]
Shi, Chuang [1 ]
Li, Zao-ying [1 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
来源：
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY | 2012年 / 72卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Chemosensor; Selectivity; Sensitivity; FLUORIDE ANION; SENSORS; DESIGN; CU(II); FLUORESCENCE; RECOGNITION; COMPLEXES; BEARING; IONS;
D O I：
10.1007/s10847-011-9941-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized hydrazones were prepared and characterized as new chemosensors for copper(II) ion. The binding properties of the compounds 4, 5, 6 and 7 for cations were examined by UV-vis, fluorescence spectroscopy, and linear sweep voltammetric experiments (LSV). The results indicate that a 1:1 stoichiometric complex is formed between compound 4 (or 5, 6, 7) and copper(II) ion, and the association constant is 1.3 x 10(5) M-1 for 4, 2.1 x 10(6) M-1 for 5, 4.1 x 10(5) M-1 for 6 and 8.0 x 10(5) M-1 for 7, respectively. The recognition mechanism between compound 4 (or 5, 6, 7) and metal ion was discussed based on their electrochemical properties, absorbance changes, and the fluorescence quenching effect when they interact with each other. Control experiments revealed that compound 4 (or 5, 6, 7) has a highly selective response to copper (II) ion.
引用
收藏
页码：79 / 88
页数：10
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