A bis-terpyridine-based trimetallic Co/Fe/Ni metallo-supramolecular polymer for electrochemical detection of 4-nitrophenol: kinetic and mechanistic insights
- 1Department of Chemistry, Jagannath University Dhaka 1100 Bangladesh
- 2Department of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Korea
Abstract
A bis-terpyridine-based trimetallic Co/Fe/Ni metallo-supramolecular polymer (polyCoFeNi) was synthesized by one-pot coordination of Co, Fe, and Ni precursors with 4′,4‴-(1,4-phenylene)bis(2,2′:6′,2″-terpyridine) and investigated as an electrode modifier for electrochemical determination of 4-nitrophenol (4-NP). UV-vis spectroscopy, FTIR, FESEM, EDS, XPS, and viscosity measurements supported formation of a Co/Fe/Ni-containing coordination material with a rough, sponge-like morphology and metal–nitrogen coordination environments. Because the one-pot synthesis and available spectroscopic data do not establish an ordered Co–Fe–Ni sequence or unique mixed-valence states, the structural interpretation is kept conservative. The polyCoFeNi-modified glassy carbon electrode showed higher O1/R2 responses than the bare electrode and the investigated monometallic analogues. Cyclic voltammetry revealed an initial irreversible reduction followed by a reversible oxidation/reduction couple, while scan-rate analysis indicated mixed diffusion–adsorption control. Under optimized conditions, a linear response was obtained over 2–2000 µM with limits of detection of 0.28 and 0.65 µM for the anodic and cathodic processes, respectively. The modified electrode also showed good reproducibility, operational stability, selectivity, and satisfactory performance in spiked water samples. These results demonstrate the potential of Co/Fe/Ni-containing bis-terpyridine metallo-supramolecular materials as electrochemical interfaces for 4-NP sensing.
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BibTeX
@article{kumkum2026bisterpyridinebased,
title = {{A bis-terpyridine-based trimetallic Co/Fe/Ni metallo-supramolecular polymer for electrochemical detection of 4-nitrophenol: kinetic and mechanistic insights}},
author = {Najia Tahsin Kumkum and Surekha Chaudhary and Md. Monjorul Islam and Sheikh Jakia Nur Oishee and Abdul Awal and Md. Delwar Hossain and Bong-Joong Kim and A. J. Saleh Ahammad},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra08328e},
url = {https://europepmc.org/article/PMC/PMC13670145},
note = {CC BY},
}
RIS
TY - JOUR
TI - A bis-terpyridine-based trimetallic Co/Fe/Ni metallo-supramolecular polymer for electrochemical detection of 4-nitrophenol: kinetic and mechanistic insights
AU - Najia Tahsin Kumkum
AU - Surekha Chaudhary
AU - Md. Monjorul Islam
AU - Sheikh Jakia Nur Oishee
AU - Abdul Awal
AU - Md. Delwar Hossain
AU - Bong-Joong Kim
AU - A. J. Saleh Ahammad
PY - 2026
DA - 2026/10/15
JO - RSC advances
DO - 10.1039/d6ra08328e
UR - https://europepmc.org/article/PMC/PMC13670145
AB - A bis-terpyridine-based trimetallic Co/Fe/Ni metallo-supramolecular polymer (polyCoFeNi) was synthesized by one-pot coordination of Co, Fe, and Ni precursors with 4′,4‴-(1,4-phenylene)bis(2,2′:6′,2″-terpyridine) and investigated as an electrode modifier for electrochemical determination of 4-nitrophenol (4-NP). UV-vis spectroscopy, FTIR, FESEM, EDS, XPS, and viscosity measurements supported formation of a Co/Fe/Ni-containing coordination material with a rough, sponge-like morphology and metal–nitrogen coordination environments. Because the one-pot synthesis and available spectroscopic data do not establish an ordered Co–Fe–Ni sequence or unique mixed-valence states, the structural interpretation is kept conservative. The polyCoFeNi-modified glassy carbon electrode showed higher O1/R2 responses than the bare electrode and the investigated monometallic analogues. Cyclic voltammetry revealed an initial irreversible reduction followed by a reversible oxidation/reduction couple, while scan-rate analysis indicated mixed diffusion–adsorption control. Under optimized conditions, a linear response was obtained over 2–2000 µM with limits of detection of 0.28 and 0.65 µM for the anodic and cathodic processes, respectively. The modified electrode also showed good reproducibility, operational stability, selectivity, and satisfactory performance in spiked water samples. These results demonstrate the potential of Co/Fe/Ni-containing bis-terpyridine metallo-supramolecular materials as electrochemical interfaces for 4-NP sensing.
SN - 2046-2069
ER -