Dual functional three-dimensional LnMOFs for luminescence sensing of nitrobenzene and Fe 3+ ions

Biomineralized Nano-Assemblies of Poly(Ethylene Glycol) Derivative with Lanthanide Ions as Ratiometric Fluorescence Sensors for Detection of Water and Fe3+ Ions

“…The plot in Figure 9 e shows an adequate linear fit with a correlation coefficient (R 2 ) of 0.998 between I Tb / I Eu and the concentration of Fe 3+ in the concentration range of 0–0.24 mM, and the linear equation is I Tb / I Eu = 5.17–1.86C (Fe 3+ ). The limit of detection (LOD) was found to be 0.46 μM, a lower value compared with that previously reported in the literature [ 47 , 48 ]. Figure S5 presents the CIE chromaticity of the Eu/Tb-PMA-MPEG solutions after adding various amounts of Fe 3+ ions under the excitation wavelength of 360 nm.…”

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

“…Tb-based MOF shows good luminescence properties that are sensitive for metal ion detection. [201][202][203][204][205][206][207][208][209] A 3-D porous Tb 3+ ion-based MOF, {[Tb(L)(DMA)]•(DMA)•(0.5H 2 O)}, where H 3 L is 3′-hydroxybiphenyl-3,4′,5-tricarboxylic acid, with free hydroxyl groups decorating the pores has been solvothermally synthesized. [201] Luminescence studies reveal that the porous MOF can selectively sense Fe 3+ ions in DMF suspension through fluorescence quenching.…”

“…[207] The Tb-based MOF, {{Me 2 NH 2 }[TbIII(L)] 3 H 2 ODMF} n derived from the flexible ligand 5-(bis(4-carboxybenzyl)amino)isophthalic acid (H 4 L), has been synthesized under solvothermal conditions. [208] The 3-D microporous structure, along with the confinement of cations inside the MOF pores, allows the complex to act as a luminescent probe to detect metal ions. Specifically, the emission profile of the Tb-MOF was completely quenched when the Fe 3+ concentration reached 5.0 × 10 −4 M in DMF.…”

“…Specifically, the emission profile of the Tb-MOF was completely quenched when the Fe 3+ concentration reached 5.0 × 10 −4 M in DMF. [208] Also, a set of 3-D porous lanthanide(III) metal−organic frameworks with a general formula [Ln 4 (μ 6 -L) 2 (μ-HCOO)(μ 3 -OH) 3 (μ 3 -O)(DMF) 2 (H 2 O) 4 ] n (Ln = terbium, europium, gadolinium, dysprosium, and erbium) was assembled. [209] Among these MOFs, the Tb-MOF showed strong emission with high detection ability to sense Fe 3+ or Ce 3+ cations via luminescence quenching.…”

Rice husk-SiO2 supported bimetallic Fe–Ni nanoparticles: as a new, powerful magnetic nanocomposite for the aqueous reduction of nitro compounds to amines

“…[38][39][40][41][42][43] On the other hand, the nitroarenes reduced to arylamines are considered as important starting materials and intermediates in pharmaceutical, antioxidants and agricultural industries. [44][45][46][47] Therefore, the catalytic reduction of nitro compounds to amines in sustainable method with green solvent has attracted a great deal of attention. Some catalytic systems have been reported such as g-Fe 2 O 3 @HAp-CD$Ag, 48 In spite of their merits, the most commonly reported methods suffer from the use of hazardous reagents, unsatisfactory yields, environmental pollution, large amounts, poor recovery of expensive catalysts and long reaction times, which ultimately lead to the production of large amount of toxic waste.…”