Abstract
Acetate is one of the carboxylate anions with the unique trigonal chemical structure, which can form strong hydrogen-bond interaction with hydrogen-bond donors. In this sense, designing receptors that can recognize and sense the acetate ion at very low levels is thought to be more and more important. A novel and simple ferrocene-based colorimetric chemosensor (E)-1-(ferrocenyl)-2-(2,4-dinitrophenyl)hydrazine (denoted below as Sensor 1) for acetate ion detection bearing hydrazone N–H group as the binding site has been successfully prepared and spectroscopically characterized. The anion recognition via hydrogen-bonding interaction was investigated by electrochemistry and UV–Vis spectroscopic measurements. Sensor 1 realized dual-channel recognition with remarkable selectivity towards acetate over other anions. In particular, the recognition process of acetate ion could be easily accompanied by a visual color change from light yellow to purple, which allowed for quick and simple “naked-eyes” detection without resorting to spectroscopic instrumentation. The binding mechanism was revealed as the hydrogen interaction between Sensor 1 and acetate ion, with binding constant of (4.95±0.12) × 105 M−1 and detection limit of 0.84±0.03 µM (corresponding to 45.05±1.61 ppb) in dimethyl sulphoxide.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
