Electrochemical and optical recognition studies of anions using a multi-site ferrocene-based benzimidazolium receptor

被引：2

作者：

Zhuo, Ji-Bin ^{[1
]}

Yan, Jian-Feng ^{[2
]}

Yuan, Yao-Feng ^{[2
]}

机构：

[1] Fujian Metrol Inst, Fuzhou 350003, Fujian, Peoples R China

[2] Fuzhou Univ, Dept Chem, Fuzhou 350108, Peoples R China

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2024年 / 1021卷

基金：

中国国家自然科学基金;

关键词：

Ferrocene; Benzimidazolium salt; Anion receptor; Electrochemistry; UV-vis; H-1 NMR spectroscopy; IMIDAZOLIUM SALTS; MOLECULAR RECOGNITION; SENSING PROPERTIES; FLUORIDE ANION; BORONIC ACID; CHEMOSENSOR; CATIONS; FLUORESCENT; MACROCYCLES; DERIVATIVES;

D O I：

10.1016/j.jorganchem.2024.123370

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel multi-site receptor 1 bearing four ferrocenyl arms comprising benzimidazolium moieties was synthesized and structurally characterized by IR, NMR, elemental analysis, mass spectra. Moreover, the structure of receptor 1 was confirmed by X-ray crystallography, it was clear that the cationic heterocyclic was interacted with PF6- through C-H<middle dot><middle dot><middle dot>F hydrogen bonds. Its electrochemical properties of sensing the various anions were investigated by cyclic voltammograms (CV) and differential pulse voltammetry (DPV), the receptor 1 displayed a significant cathodic shift for F(-)and OH-. The addition of F- and OH(-)to the solution of receptor 1 resulted in obvious absorption changes in the UV-Vis spectrum, showing that receptor 1 was an excellent sensor for these analytes (F-: LOD = 3.11 x 10(-6) M, LOQ = 1.03 x 10(-5) M, K-a = 5.83 x 10(5) M-1; and OH-: LOD = 1.36 x 10(-6) M, LOQ = 4.11 x 10(-5) M, K-a = 9.03 x 10(5) M-1). H-1 NMR titrations demonstrated that anion was recognized by receptor 1 through (C-H)(+)<middle dot><middle dot><middle dot>X- and C-H<middle dot><middle dot><middle dot>X hydrogen bonds, the binding process involve initial formation of hydrogen bond and followed by deprotonation.

引用

页数：9