Cobalt-Neodymium Coordination Frameworks as Efficient Platforms for Sensitive Electrochemical Detection of Carmoisine
Jeevanantham Arumugam1, Ganesan Shanmugam1, Monisha Venkatesan1
1Energy Conversion and Energy Storage Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu-603203, India.
Abstract:
Cobalt-neodymium coordination frameworks (Co-Nd CFs) were synthesized via a solvothermal approach and employed for the sensitive electrochemical detection of carmoisine (CAR) in food samples by modifying a glassy carbon electrode (GCE). Co-Nd CFs' structural and morphological characteristics reveal an amorphous framework with a spherical-shaped mesoporous profile. The proposed detection was conducted using a B-R buffer solution pH of 7.0 in optimal conditions using a three-electrode system. Conversion of an azo-enol into a keto hydrazone, mediated by the modified Co-Nd CFs/GCE, enables a sensitive and linear response toward CAR. An acceptable detection limit (LOD) of 0.0557 μM, with a quantification limit (LOQ) of 0.1863 μM, was observed in the concentration range of 0.33 to 6.7 μM. The findings disclose high stability (RSD = 3.996%) and reproducibility (RSD = 3.95%) upon CAR detection. This is due to the Co-Nd CFs/GCE high ionic conductivity, enhanced mass transport, and large electroactive surface area and the potent synergistic interactions between Co and Nd ions. Overall, the proposed platform is suitable for real-world electrochemical analysis and offers a viable solution for detecting trace levels of synthetic food colorants.
More Related Videos
07:07Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
Published on: March 12, 2015
13:15Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
Published on: June 1, 2011
Related Concept Videos
Complexometric Titration: Ligands
Controlled-Potential Coulometry: Electrolytic Methods
The chosen potential...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Valence Bond Theory
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Coordination Compounds and Nomenclature
