Slow magnetic relaxation in a two-dimensional dysprosium(III) coordination polymer

She, Shixiong; Gong, L.; Wang, Bo; Yang, Yan; Lei, Quan; Liu, Beibei; Su, Gangping

doi:10.1016/j.inoche.2016.05.004

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…SMM and slow magnetic relaxations − are the common feature in Dy(III) MOFs. Interestingly, a Gd(III) MOF is reported to exhibit magnetocaloric effect, whereas Er(III) and Gd(III) 2D MOFs display antiferromagnetic interactions. ,, A number of heterobimetallic MOFs containing Cu(II) and lanthanide(III) have been investigated for magnetic properties such as SMM, , ferromagnetic behavior below 50 K, and spin glass like unusual field dependent magnetic relaxation …”

Section: Properties and Applicationsmentioning

confidence: 99%

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

et al. 2021

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Among the recent developments in metal-organic frameworks (MOFs), porous layered coordination polymers (CPs) have garnered attention due to their modular nature and tunable structures. These factors enable a number of properties and applications, including gas and guest sorption, storage and separation of gases and small molecules, catalysis, luminescence, sensing, magnetism, and energy storage and conversion. Among MOFs, two-dimensional (2D) compounds are also known as 2D CPs or 2D MOFs. Since the discovery of graphene in 2004, 2D materials have also been widely studied. Several 2D MOFs are suitable for exfoliation as ultrathin nanosheets similar to graphene and other 2D materials, making these layered structures useful and unique for various technological applications. Furthermore, these layered structures have fascinating topological networks and entanglements. This review provides an overview of different aspects of 2D MOF layered architectures such as topology, interpenetration, structural transformations, properties, and applications.

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Section: Properties and Applicationsmentioning

confidence: 99%

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

et al. 2021

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“…And may be for the same reason the χ M values are quite smaller as compared to χ M value in the AC susceptibility plots (Figure 5a,b). As χ M " versus T plots do not show any peak maxima above 2 K, so the τ 0 the energy barrier (U eff ) cannot be determined by using the Arrhenius method [62,63]. So by using another method, which assumes that there is only one single relaxation process with one energy barrier and one time constant that can be extracted by the following equation (Debye Model) [ The best fit of Debye equation yielded an energy barrier of 2.5 K ( Figure 6) and τ 0 is 6.6 × 10 −7 s. It is worth noting that these are only approximate values and therefore should be taken with caution [61].…”

Section: Dynamic Magnetic Measurementmentioning

confidence: 99%

Field Induced Slow Magnetic Relaxation in a Non Kramers Tb(III) Based Single Chain Magnet

Kharwar¹,

Mondal²,

Konar³

2018

Magnetochemistry

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Herein, we report a novel Tb(III) single chain magnet with the chemical formulae [Tb(μ-OH2)(phen)(μ-OH)(nb)2]n by using 4-nitrobenzoic acid (Hnb) and 1,10-phenanthroline (phen) as ligand system. The single-crystal X-ray diffraction reveals that 4-nitrobenzoic acid acts as a monodentate ligand, water and hydroxyl ions are the bridging ligand and the phen serves as a bidentate chelating ligand. The static magnetic susceptibility measurement (from 2 K to 300 K) shows ferromagnetic interaction at very low temperature (below 6 K). The alternating current (AC) susceptibility data of the complex show temperature and frequency dependence under an applied 2000 Oe DC (direct current) field. The phen moiety behaves as an antenna and enables the complex to show the green light fluorescence emission by absorption-energy transfer-emission mechanism. To calculate the exchange interaction, broken symmetry density functional theory (BS-DFT) calculations have been performed on a model compound which also reveals weak ferromagnetic interaction. Ab initio calculations reveals the anisotropic nature (gz = 15.8, gy, gy = 0) of the metal centre and the quasi doublet nature of ground state with small energy gap and that is well separated from the next excited energy state.

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Two Dysprosium(III)‐Based Single‐Molecule Magnets Derived from 1,10‐Phenanthroline Ligands and Different Anions as Bridging Groups

She

Wang

et al. 2017

Eur J Inorg Chem

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Two Dy compounds, [Dy2(Phen)2(CH3COO)6] (1; Phen = 1,10‐phenanthroline) and [Dy(Phen)2(NO3)3] (2), were obtained by the reactions of Phen with different dysprosium salts containing different anions, which act as bridging groups and greatly affect the coordination polyhedra of the metal ions. In the former complex, the DyIII ions are bridged by acetate anions and adopt a spherical capped square antiprismatic (C4v) coordination environment, whereas a bicapped square antiprism (D4d) was observed for 2, in which the DyIII ions are bridged by nitrate anions. Static and dynamic magnetic measurements revealed that both compounds display slow magnetic relaxation but with fast quantum tunneling of magnetization (QTM). In an applied direct‐current (dc) field, the QTM was suppressed, and two slow magnetic relaxation processes occurred for both compounds. Comparative studies on the magnetic properties indicate how the ligand field and the local geometric symmetry of the magnetic anisotropy of the DyIII center leads to differing magnetic behavior.

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Slow magnetic relaxation in a two-dimensional dysprosium(III) coordination polymer

Cited by 5 publications

References 27 publications

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

Field Induced Slow Magnetic Relaxation in a Non Kramers Tb(III) Based Single Chain Magnet

Two Dysprosium(III)‐Based Single‐Molecule Magnets Derived from 1,10‐Phenanthroline Ligands and Different Anions as Bridging Groups

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