A New Cr3+ Electrochemical Sensor Based on ATNA/Nafion/Glassy Carbon Electrode

被引:16
作者
El-Shishtawy, Reda M. [1 ]
Rahman, Mohammed M. [1 ]
Sheikh, Tahir Ali [2 ]
Nadeem Arshad, Muhammad [1 ]
Al-Zahrani, Fatimah A. M. [3 ]
Asiri, Abdullah M. [1 ]
机构
[1] King Abdulaziz Univ, Chem Dept, Fac Sci, Jeddah 21589, Saudi Arabia
[2] Govt Punjab, Irrigat Res Inst, Irrigat Dept, Lahore 54000, Pakistan
[3] King Khalid Univ, Chem Dept, Fac Sci, POB 9004, Abha 61413, Saudi Arabia
关键词
1,1 '-(-((Disulfanediylbis(2,1-phenylene))bis(azaneylylidene))bis(methaneylylidene))bis(naphthalene-2-ol); homobifunctional tridentate disulfide Schiff base; Cr3+ ions; electrochemical method; glassy carbon electrode; environmental remediation; LIQUID-CHROMATOGRAPHY; SELECTIVE DETECTION; ION CHROMATOGRAPHY; CHROMIUM(III); CR(III); SPECIATION; PERFORMANCE; PRECONCENTRATION; COMPLEXES; CR(VI);
D O I
10.3390/ma13122695
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new electrochemical sensor of metal cation in an aqueous solution based on homobifunctional tridentate disulfide Schiff base and named 1,1 '-(-((disulfanediylbis(2,1-phenylene))bis(azaneylylidene))bis(methaneylylidene))bis(naphthalene-2-ol) (ATNA) was easily obtained quantitatively from the condensation reaction of 2-hydroxy-1-naphthaldehyde and2-aminothiophenol, and then fully characterized by spectroscopic techniques for structure elucidation. The molecular structure of ATNA was also confirmed by a single-crystal X-ray diffraction study to reveal a new conformation in which the molecule was stabilized by the O-H horizontal ellipsis N type intramolecular hydrogen bonding interactions in both moieties. The ATNA was used as a selective electrochemical sensor for the detection of chromium ion (Cr3+). A thin film of ATNA was coated on to the flat surface of glassy carbon electrode (GCE) followed by 5 % ethanolic Nafion in order to make the modified GCE (ATNA/Nafion/GCE) as an efficient and sensitive electrochemical sensor. It was found to be very effective and selective against Cr(3+)cations in the company of other intrusive heavy metal cations such as Al3+, Ce3+, Co2+, Cu2+, Ga3+, Hg2+, Mn2+, Pb2+, and Y3+. The detection limit at 3 S/N was found to be 0.013 nM for Cr(3+)ions within the linear dynamic range (LDR) (0.1 nM-10.0 mM) of Cr(3+)ions with r(2)= 0.9579. Moreover; this work instigates a new methodology for developing the sensitive as well as selective electrochemical toxic cationic sensors in the field of environmental and health care.
引用
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页码:1 / 19
页数:19
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