Achieving Multifunctional Detection of Th⁴⁺ and UO₂²⁺ in the Post‐Synthetically Modified Metal–Organic Framework and Application of Functional MOF Membrane

Abstract

The field of post‐synthesis modification has aroused widespread concern from diverse perspectives, including chemistry, biology, and material science. Post‐synthesis modification can introduce rich functionality into metal–organic frameworks (MOFs) without destroying the main structure of MOFs. Based on this research status, a series of lanthanide metal–organic frameworks ([Ln2(NH2‐BDC)2.5(CH3COO)(DMA)(H2O)]•DMA, Ln = Pr, Nd, Sm, Eu, Gd and Tb, NH2‐BDC = 2‐aminoterephthalic acid, DMA = N,N‐Dimethylacetamide) with 3D network structures, are synthesized by hydrothermal synthesis. Due to the presence of uncoordinated amino groups in the ligands, a series of post‐synthesis modified compounds are successfully synthesized through aldimine condensation reaction. Based on the good fluorescence properties and stable structure of coordination polymers and post‐synthesis modified compounds in water or organic solvents, they are able to be used as potential fluorescence sensor for the detection of Th4+, UO22+, and Cr2O72−, and the calculation result shows that the post‐synthesis modified compounds are more sensitive to the detection of analytes (Th4+, UO22+ and Cr2O72−) than coordination polymers. In addition, the MOF membrane prepared by self‐assembly of [Eu2(NH2‐BDC)2.5(CH3COO)(DMA)(H2O)]•DMA and ternary soap‐free copolymer (VAc‐AA‐BA) emulsion can be used first for detecting aldehyde vapors.

Recent Progress in Metal-Organic Framework Based Fluorescent Sensors for Hazardous Materials Detection

“…The sensing mechanism indicated that the competitive absorption of the excitation light significantly contributed to the luminescence quenching, whereas the high uptake and sensing capacity toward Th 4+ were mainly caused by host-guest interaction. In 2021, Li et al proposed a series of 3D LMOFs, [Ln 2 (NH 2 -BDC) 2.5 (CH 3 COO)(DMA)(H 2 O)]·DMA, Ln = Pr, Nd, Sm, Eu, Gd, and Tb, NH 2 -BDC = 2-aminoterephthalic acid, DMA = N,N -Dimethylacetamide) by hydrothermal synthesis, as shown in Figure 13 a [ 96 ]. A series of post-synthesis modified materials with great fluorescence and quite stable structure were finally synthesized by an aldimine reaction, due to the existence of uncoordinated amino groups in the organic ligands.…”

Construction of Large-Scale Conjugated Functionalized Cyclotriphosphazene Lanthanide Framework for Selective Sensing of Volatile Organic Compounds and Assembly of Color-Tunable Dye-Encapsulated Composites

“…We select compound 1 to detect three aldehyde vapors (salicylic aldehyde, furfural, and benzaldehyde). In order to detect aldehydes vapors speedily, we have prepared a homemade equipment . First, we put the double-sided tape on the appropriate position of the quartz plate, and then evenly smear compound 1 powder on the double-sided tape.…”

“…In order to detect aldehydes vapors speedily, we have prepared a homemade equipment. 44 First, we put the double-sided tape on the appropriate position of the quartz plate, and then evenly smear compound 1 powder on the double-sided tape. The quartz plate was placed into the cuvette, and then 20 μL of aldehyde compounds were dropped into the cuvette.…”

Stimulus‐Responsive Lanthanide MOF Materials Encapsulated with Viologen Derivatives: Characterization, Photophysical Properties and Sensing on Nitrophenols

“…The single-crystal diffraction results showed that the red crystals were the title compounds, while the pale yellow ones were the compounds reported in the literature. [32] Due to the introduction of the chromophore pbpyCl 2 moiety, we suspected that addition of pbpyCl 2 was responsible for the reason of the corresponding two compound crystals. First, we changed the amount of pbpyCl 2 , other things being equal.…”

“…In previous work, we successfully synthesized MOFs by using NH 2 -BDC and lanthanide metal salts. [32] In this work, we attempted to embed the chromophore pbpy moieties into MOF channels or coordinate with rare earths to alter the fluorescence properties. However, the synthesis process was not as smooth as expected.…”