Three new metal complexes with imidazole-containing tripodal ligands as fluorophores for nitroaromatics- and ion-selective sensing

A Ni-MOF based luminescent sensor for selective and rapid sensing of Fe(ii) and Fe(iii) ions

“…5 and 6, the fluorescence intensity of the MOF rapidly decreased as the analyte concentration increases from 0 to 1000 μM, displaying a quenching process that is diffusion-controlled. 16 Furthermore, the limit of detection (LOD) was found to be 25.03 μM and 15.44 μM for Fe 2+ and Fe 3+ , respectively (Table S1, ESI†), which seems to be better as compared to the previously reported MOFs (Table S2, ESI†). As per the literature, the following formula has been used for the calculation of the detection limit of Fe 2+ and Fe 3+ .…”

“…The remaining residue is NiO, which is found to be 26.22%. 16,[32][33][34][35][36] Prior to the adsorption tests, the sample was degassed overnight at 120 1C. The surface area, average pore diameter, pore volume, pore size, and average particle size are displayed in Table S3 (ESI †).…”

“…Moreover, there are a few reports on MOFs being used as chemosensors to distinguish Fe 3+ from other metal ions. 16 Unfortunately, for the detection of metal ions, traditional data analysis techniques such as liquid chromatography, inductively coupled plasma (ICP), atomic mass spectrometry (ICP-MS), atomic absorption spectrophotometry (AAS), and voltammetry are not very user friendly because of their specialized equipment, complex procedure, low selectivity, and high cost. Also, magnetic measurements, Mo ¨ssbauer and X-ray absorption spectroscopy, or EXAFS are commonly used to detect and distinguish Fe 2+ and Fe 3+ , which are sophisticated approaches.…”

“…Moreover, there are a few reports on MOFs being used as chemosensors to distinguish Fe 3+ from other metal ions. 16…”

Synthesis and Structures of Four Metal‐Organic Coordination Compounds with Isomeric Tripodal Ligands

“…In the construction of new supramolecular coordination compounds, tripodal ligands are of special interest since they have three functional pendants and variable coordination sites . Recently, we focus our attention on diazole‐containing or pyridine‐containing tripodal ligands, and have acquired diverse coordination compounds from mononuclear, dinuclear, tetranuclear, to polynuclear one‐dimensional (1D) zigzag chain structures .…”