Synthesis, Characterization, Electrochemistry, Photoluminescence and Magnetic Properties of a Dinuclear Erbium(III)-Containing Monolacunary Dawson-Type Tungstophosphate: [{Er(H2O)(CH3COO)(P2W17O61)}2]16−

Ibrahim, Masooma; Baksi, Ananya; Peng, Yan; Al-Zeidaneen, Firas Khalil; Mbomekallé, Israël Martyr; Oliveira, Pedro de; Anson, Christopher E.

doi:10.3390/molecules25184229

Cited by 2 publications

(4 citation statements)

References 49 publications

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“…2(b) [Ln2(H2ox)2(ox)(α2-P2W17O61)2] 16-[Ln= Ho, Er, Tm, Yb, Y; H2ox= oxalic acid] [55] [(LnP2W17)2] (2:2) Fig. 2(c) [{Er(H2O)(CH3COO)(P2W17O61)}2] 16- [56] [(ErP2W17)2] (2:2) Fig. 2(d) [(PW11O39)2Dy2X2(H2O)2] 10-(X=-OH, F -, OAc -) [57] [(DyPW11)2] (2:2) Fig.…”

Section: Lnocsmentioning

confidence: 99%

“…POMs themselves have applications in the fields of electronics, electrochemistry, catalysis, biology, nanomaterials, and surface science. The POMs-based LnOCs have the advantages of lanthanide ions in optical and magnetic and have certain applications in catalytic, proton conduction, biomedicine, electrochemistry, and other related fields [52,56,58,76,88,154,158]. In this review, we focus on the current status of the property of POMs-based LnOCs in single-molecule magnet and proton conductivity.…”

Section: Applications Of Poms-based Lnocsmentioning

confidence: 99%

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Recent advances in polyoxometalate-based lanthanide–oxo clusters

Liu

et al. 2023

Polyoxometalates

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Polyoxometalates (POMs)-based lanthanide-oxo clusters (LnOCs) are a class of polynuclear lanthanide-oxygen complexes formed by polyoxometalates stabilization through oxygen bridge linkage, in which the POMs can be viewed as multi-dentate inorganic ligands. The POMs-based LnOCs have received a lot of attention because of their interesting structures and potential applications. In this paper, we summarize the classification, synthesis strategies, and properties of POMs-based LnOCs. Herein, the POMs-based LnOCs are classified into three main categories according to their metal core element types and quantities: pure 4f clusters, 5d-4f clusters, and 3d-4f clusters. Their synthetic strategies are grouped into four categories based on the source of the POMs involved in the structural assembly: lacunary POMs ligand-directed method, in-situ transformation of lacunary POMs ligand-directed method, in-situ generation of lacunary POMs ligand-directed method, and mixing multiple synthesis strategies. The single-molecule magnets and proton conductivity properties of POMs-based LnOCs are summarized.

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Section: Lnocsmentioning

confidence: 99%

Section: Applications Of Poms-based Lnocsmentioning

confidence: 99%

Recent advances in polyoxometalate-based lanthanide–oxo clusters

Liu

et al. 2023

Polyoxometalates

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“…As part of our continuous research in this field, we report another approach to investigate PRE of POM molecules that contain homometallic paramagnetic lanthanides. Thus, NMR relaxometry of aqueous solutions containing POMs K5[Dy(H2O)4GeW11O39]•16H2O (Dy-W11), K5[Er(H2O)3GeW11O39]•20H2O (Er-W11) [37], and (NH2Me2)13Na3[{Er(H2O)(CH3COO)(P2W17O61)}2]•40H2O (Er2-W34) [38] has been carried out at 1 H Larmor frequencies from 20 MHz to 1.4 GHz. 2).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, every Er III ion in these units is coordinated by four O atoms of the POM ligand, two oxygen atoms of an acetate ligand, one O atom of the other acetate ligand and one terminal aqua ligand (Figure 3). The mass spectrometry data suggest that the polyanion Er 2 -W 34 is fragmented into monomeric species [38]. In some cases, MS performed under vacuum and µM conditions does not necessarily detect the species in solution, but rather captures the fragments of complexes that exist in the gas phase.…”

Section: Introductionmentioning

confidence: 99%

NMR Relaxivities of Paramagnetic Lanthanide-Containing Polyoxometalates

et al. 2021

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The current trend for ultra-high-field magnetic resonance imaging (MRI) technologies opens up new routes in clinical diagnostic imaging as well as in material imaging applications. MRI selectivity is further improved by using contrast agents (CAs), which enhance the image contrast and improve specificity by the paramagnetic relaxation enhancement (PRE) mechanism. Generally, the efficacy of a CA at a given magnetic field is measured by its longitudinal and transverse relaxivities r1 and r2, i.e., the longitudinal and transverse relaxation rates T1−1 and T2−1 normalized to CA concentration. However, even though basic NMR sensitivity and resolution become better in stronger fields, r1 of classic CA generally decreases, which often causes a reduction of the image contrast. In this regard, there is a growing interest in the development of new contrast agents that would be suitable to work at higher magnetic fields. One of the strategies to increase imaging contrast at high magnetic field is to inspect other paramagnetic ions than the commonly used Gd(III)-based CAs. For lanthanides, the magnetic moment can be higher than that of the isotropic Gd(III) ion. In addition, the symmetry of electronic ground state influences the PRE properties of a compound apart from diverse correlation times. In this work, PRE of water 1H has been investigated over a wide range of magnetic fields for aqueous solutions of the lanthanide containing polyoxometalates [DyIII(H2O)4GeW11O39]5– (Dy-W11), [ErIII(H2O)3GeW11O39]5– (Er-W11) and [{ErIII(H2O)(CH3COO)(P2W17O61)}2]16− (Er2-W34) over a wide range of frequencies from 20 MHz to 1.4 GHz. Their relaxivities r1 and r2 increase with increasing applied fields. These results indicate that the three chosen POM systems are potential candidates for contrast agents, especially at high magnetic fields.

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Synthesis, Characterization, Electrochemistry, Photoluminescence and Magnetic Properties of a Dinuclear Erbium(III)-Containing Monolacunary Dawson-Type Tungstophosphate: [{Er(H2O)(CH3COO)(P2W17O61)}2]16−

Cited by 2 publications

References 49 publications

Recent advances in polyoxometalate-based lanthanide–oxo clusters

Recent advances in polyoxometalate-based lanthanide–oxo clusters

NMR Relaxivities of Paramagnetic Lanthanide-Containing Polyoxometalates

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