EPR characterization of a nanoporous metal-organic framework exhibiting a bulk magnetic ordering

Maspoch, Daniel; Vidal-Gancedo, José; Ruiz‐Molina, Daniel; Rovira, Concepció; Veciana, Jaume

doi:10.1016/j.jpcs.2003.11.026

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…These structural properties make MOFs attractive materials for potential applications in gas storage, separation by selective adsorption, and catalysis. − Here, they compete with conventional inorganic zeolite or aluminophosphate based molecular sieves. Moreover, the use of open-shell paramagnetic transition metal ions in the MOF synthesis allows the development of novel porous materials with additional magnetic properties , featuring antiferromagnetism, ferromagnetism, , and ferrimagnetism, as well as guest-controlled magnetic ordering , and spin crossover effects . Such low-density magnetic materials are in particular interesting for future application for magnetic sorting, as magnetic sensors, and multifunctional materials …”

Section: Introductionmentioning

confidence: 99%

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂

et al. 2008

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The metal−organic framework (MOF) compound Cu3(BTC)2(H2O)3·xH2O (BTC = benzene 1,3,5-tricarboxylate) was prepared by solvothermal synthesis under ambient pressure and structurally characterized by powder X-ray diffraction and nitrogen adsorption at 77 K. X- and Q-band CW electron spin resonance and hyperfine sublevel correlation spectroscopies were used to explore the coordination state and location of the Cu(II) ions in the porous coordination polymer. Cupric ions were found to be present in two different chemical environments: (a) Cu(II)2 clusters in the paddle-wheel building blocks of the Cu3(BTC)2 network, giving rise to an antiferromagnetically coupled spin state in accordance with previous susceptibility measurements (J. Appl. Phys. 2000, 87, 6007). However, the cross-linking of the paddle wheels by the BTC linker leads to an additional spin exchange among dimers as evidenced by the characteristics of the S = 1 ESR signal of their excited spin state. (b) In addition, paramagnetic monomer Cu(II) species are accommodated in the pore system of Cu3(BTC)2. They coordinate to adsorbed water molecules and form [Cu(H2O)6]2+ complexes, which are inhomogeneously distributed over the Cu3(BTC)2 pore system.

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Section: Introductionmentioning

confidence: 99%

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂

et al. 2008

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Electron Paramagnetic Resonance

Mendt

Šimėnas

Pöppl

2016

The Chemistry of Metal-Organic Frameworks: Synthesis, Characterization, and Applications

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Two Extended 5‐Methyltetrazolate‐Based Magnetic Complexes: Synthesis, Structure, and Magnetic Properties

Liu

Dong

Yang

et al. 2013

Zeitschrift anorg allge chemie

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Two 5‐methyl‐tetrazolate (mtz–)‐based paramagnetic metal coordination polymers, {[Cu2(H2O)2(mtz)(μ3‐OH)(nip)]·H2O}n (1) and [Cu(H2O)(mtz)2]n (2), were obtained in the presence and absence of aromatic 5‐nitroisophathalate (nip2–) coligand by varying the preparation methods. Structural determinations reveal that 1 is a three‐dimensional (3D) framework with corner‐sharing triangular ribbons infinitely extended by ditopic nip2– connectors. In contrast, 2 is a coplanar (4,4) layer constructed from square‐pyramidal CuII ions and μ‐N1,N4‐mtz– linkers, which is further assembled into a 3D supramolecular network by interlayer hydrogen‐bonding interactions. Magnetically, spin‐frustrated antiferromagnetic ordering is observed in the 3D framework of 1 and canted antiferromagnetic behavior with a slight spin‐flop transition is presented in 2, which are structurally resulting from the locally Δ‐ribbon in 1 and asymmetric magnetic superexchange mediated by the μ‐N1,N4‐mtz– bridge of 2.

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EPR characterization of a nanoporous metal-organic framework exhibiting a bulk magnetic ordering

Cited by 7 publications

References 15 publications

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂

Electron Paramagnetic Resonance

Two Extended 5‐Methyltetrazolate‐Based Magnetic Complexes: Synthesis, Structure, and Magnetic Properties

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EPR characterization of a nanoporous metal-organic framework exhibiting a bulk magnetic ordering

Cited by 7 publications

References 15 publications

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu3(BTC)2

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu3(BTC)2

Electron Paramagnetic Resonance

Two Extended 5‐Methyltetrazolate‐Based Magnetic Complexes: Synthesis, Structure, and Magnetic Properties

Contact Info

Product

Resources

About

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂

CW and Pulsed ESR Spectroscopy of Cupric Ions in the Metal−Organic Framework Compound Cu₃(BTC)₂