MIL-88B(Fe)-NH₂: an amine-functionalized metal–organic framework for application in a sensitive electrochemical sensor for Cd²⁺, Pb²⁺, and Cu²⁺ ion detection

Abstract

We propose here an electrochemical platform for multi-heavy metal ion detection in water based on MIL-88B(Fe)-NH2, an amine-functioned metal–organic framework (MOF) for modifying the surface of a glassy carbon electrode (GCE).

Iron/Iron(III) Oxide Decorated on Electrochemically Reduced Graphene Oxide: a Novel One-Step Electrosynthesis and a Fabrication of an Electrochemical Ascorbic Acid Sensor

“…Moreover, in Fig. 3B (curve b), the band at 532 cm −1 assigned to the Fe-O stretching vibration appears, 30,34,35 in contrast, in Fig. 3B (curve a), this band does not appear.…”

“…The obtained electrochemical AA sensor shows a wide linear range from 0.05 mM to 10.00 mM and a low limit of detection (LOD) of 5.93 μM (at S/N > 3). 34,39 The selectivity of the fabricated sensor was studied by measuring CVs of Pt/ERGO/Fe-Fe 2 O 3 microelectrodes (as presented in Figure 6C depicts that in all five CV curves, an anodic peak corresponding to AA electrooxidation appears, besides, the anodic peak current increases as the concentration of additional AA increases.…”

Chromium-Modified Lanthanum-Based Metal–Organic Framework: Novel Electrochemical Sensing Platform for Pb(II) Ions

“…The presence of well-defined and intensified redox peaks in the CV curve of Cr@La-TMA is indicative of its enhanced electrochemical activity. This could be instrumental in its role as an electrochemical sensor, as the modified La-TMA's increased reactivity may contribute to improved selectivity and sensitivity toward the target analyte, Pb(II) [16].…”

Ligand Emission-Based Turn-On Sensing of Glyphosate via Competitive Coordination with NH2-MIL-88B (Fe) MOF Nanocrystals

“…47 NH 2 -MIL-88B (Fe) MOFs have been utilized in various applications, including heterogeneous catalysis, 48 adsorption, 49 sodium-ion batteries, 50,51 delivery vehicles in pharmacological and therapeutic applications, 52 and electrochemical sensing. 53 The NH 2 -MIL-88B (Fe) MOF structure contains NH 2 −BDC ligand molecules that exhibit a high fluorescence signal intensity in their free state. Controlled release of free NH 2 − BDC ligand molecules from the MOF structure under specific conditions can offer a significant advantage in serving as a sensing probe compared to other existing strategies that primarily rely on simply modifying conventional tagged fluorescent molecules on MOFs for engineering MOF-based fluorescence sensors.…”

“…On the other hand, NH 2 -MIL-88B (Fe)-based MOFs are gaining more attention due to their chemical and thermodynamic stability, controllable sizes and shapes, low toxicity, biocompatibility, and the abundance of cheap raw materials . NH 2 -MIL-88B (Fe) MOFs have been utilized in various applications, including heterogeneous catalysis, adsorption, sodium-ion batteries, , delivery vehicles in pharmacological and therapeutic applications, and electrochemical sensing . The NH 2 -MIL-88B (Fe) MOF structure contains NH 2 –BDC ligand molecules that exhibit a high fluorescence signal intensity in their free state.…”