Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7145441 | Sensors and Actuators B: Chemical | 2015 | 9 Pages |
Abstract
Selective electrochemical sensors based on newly synthesized ferrocene appended quinoline-triazole (FAQT) derivative for Fe (III) ions have been developed. The cyclic voltammetry (CV) of FAQT exhibited reversible voltammogram corresponding to ferrocene/ferrocenium redox process in the potential range of â0.4 to 0.6Â V vs Ag/Ag+. The CV of FAQT undergoes electrochemical perturbation on addition of Fe (III) ions and results in the shift of voltammogram toward more positive potential (anodic shift) which ascribed the formation of FAQT-Fe (III) complex. The binding behavior and 1:1 stoichiometry of FAQT-Fe (III) complex was further confirmed by employing fluorescence and UV-visible techniques. The high binding constant (1.82Â ÃÂ 103Â Mâ1) and negative free energy change (â18.6Â kJÂ molâ1) indicates the stability and feasibility of FAQT-Fe (III) complex. The voltammetric sensor works within the concentration range of 1.0Â ÃÂ 10â4-5.0Â ÃÂ 10â6Â M with detection limit of 2.33Â ÃÂ 10â7Â M. The potentiometric solid contact electrode exhibits the Nernstian slope of 18.7Â mVÂ decadeâ1 for Fe (III) ions in concentration range of 1.0Â ÃÂ 10â1-1.0Â ÃÂ 10â7Â M with the detection limit of 2.94Â ÃÂ 10â8Â M. These proposed sensors showed high selectivity toward Fe (III) ions and therefore, used for quantification of Fe (III) ions in different sample matrices.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ajar Kamal, Sumit Kumar, Vipan Kumar, Rakesh Kumar Mahajan,