Sonochemically synthesized microporous metal–organic framework representing unique selectivity for detection of Fe3+ ions

Efficient Fluorescence detection of Fe³⁺, Cd²⁺, and CH₂Cl₂ based on an azine-Functionalized Zn-Metal-Organic Framework

“…When the as-synthesized TMU-16 is immersed in different solutions of metal ions, it shows a slight change in d-spacing and the disappearance of a few peaks in the PXRD patterns ( Fig. 1a), which is a common phenomenon for the doubly interpenetrated MOFs as established by Kitagawa et al [31,32]. Furthermore, we tracked the structure properties of regenerated TMU-16 by FTIR.…”

Recent Advances in Nanocomposite Luminescent Metal-Organic Framework Sensors for Detecting Metal Ions

“…[130] A highly luminescent three-dimensional MOF, [Zn 2 (oba) 2 (bpy)], (oba = 4,4 ′ -oxybis(benzoicacid); bpy = 4,4 ′ -bipyridine), was prepared via ultrasound irradiation and labeled as complex 1. [131] Fluorescence titration experiments reveal that the Zn-based MOF is highly selective for Fe 3+ ion in methanol through a fluorescence quenching mechanism with a response time of < 2 min; the limit of detection reaches a low level of 0.3 μM. The static quenching constant with Fe 3+ was calculated to be greater than 58000 M −1 with no interference effect observed for several metal ions, such as As 3+ , Al 3+ , Cd 2+ , Zn 2+ , Co 2+ , Ni 2+ , Cu 2+ , and Pb 2+.…”

“…The static quenching constant with Fe 3+ was calculated to be greater than 58000 M −1 with no interference effect observed for several metal ions, such as As 3+ , Al 3+ , Cd 2+ , Zn 2+ , Co 2+ , Ni 2+ , Cu 2+ , and Pb 2+. [131] Similarly, a chiral 3-D luminescent zinc(II)-MOF [Zn(BPDPE) 2 (dca) 2 ] n (complex 1) where BPDPE = 4,4′-bis (pyridy)diphenyl ether, H 2 dca = Dextro-camphoric acid, was obtained and found to exhibit ligand-based emission in solution, providing fluorescence sensing material for detecting metal ions. As shown in Figure 8, fluorescence titration experiments provide highly selective, sensitive, and reproducible fluorescence sensing performances for detecting Fe 3+ ion through luminescence quenching with a binding constant of 1.10 × 10 5 M −1.…”

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

“…These materials can be synthesized normally at ambient temperatures of up to 220 °C, at atmospheric pressure, and in the pH range of 1–10 by various methods such as solvo(hydro)thermal, mechanochemical, sonochemical, electrochemical, layer‐by‐layer growth, and microwave . The infinite combinations of metal nodes and organic linkers can yield new frameworks having diverse constructions along with fascinating properties, such as heterogeneous catalysis and photocatalysis, drug delivery, energy storage, gas storage, sensing, and adsorption and detection of hazardous materials . Among the reported adsorbents, MOFs are considered as one of the most encouraging materials for removal of the HMIs, due to their high design capability, large surface areas, optimal chemical as well as physical properties, high porosity and intelligent architecture .…”