Changes in magnetic order through two consecutive dehydration steps of metal-phosphonate diamond chains

Su, Yanhui; Jia, Jia-Ge; Huang, Xingyuan; Feng, Ji; Bao, Song‐Song; Ren, Min; Kurmoo, Mohamedally; Zheng, Li‐Min

doi:10.1039/c9ra05722f

Cited by 3 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CoU-190 shows the longest relaxation time, in accordance with the fact that the Co(II) ion in CoU-190 has a quasi-two-coordinate environment. Dehydration-induced magnetic changes were previously observed in cobalt systems, [61][62][63] but those related to single-ion magnetic behavior were rare. [64,65] It is interesting that the restacked nanosheets of CoU-ns show magnetic relaxation much faster than the pristine CoU.…”

Section: Chemistry-a European Journalmentioning

confidence: 99%

Layered Uranyl Phosphonates Encapsulating Co(II)/Mn(II)/Zn(II) Ions: Exfoliation into Nanosheets and Its Impact on Magnetic and Luminescent Properties

Wen

Zou

et al. 2022

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

Layered heterometallic 5f-3d uranyl phosphonates can exhibit unique luminescent and/or magnetic properties, but the fabrication and properties of their 2D counterparts have not been investigated. Herein we report three heterobimetallic uranyl phosphonates, namely, [(UO 2 ) 3 M(2-pmbH) 4 (H 2 O) 4 ] • 2H 2 O [MU, M=Co(II), CoU; Mn(II), MnU; Zn(II), ZnU; 2-pmbH 3 = 2-(phosphonomethyl)benzoic acid]. They are isostructural and display two-dimensional layered structures where the M(II) centers are encapsulated inside the windows generated by the diamagnetic uranyl phosphonate layer. Each M(II) has an octahedral geometry filled with four water molecules in the equatorial positions and two phosphonate oxygen atoms in the axial positions. The uranium atoms adopt UO 7 pentagonal bipyramidal and UO 6 square bipyramidal geometries. The lattice and coordination water molecules can be released by thermal treatment and reabsorbed in a reversible manner, accompanied with changes of magnetic dynamics. Interestingly, the bulk samples of MU can be exfoliated in acetone via freezing and thawing processes forming nanosheets with single-layer or two-layer thickness (MU-ns). Magnetic studies revealed that the CoU and MnU systems exhibited field-induced slow magnetization relaxation at low temperature. Compared with crystalline CoU, the magnetic relaxation of the CoU-ns aggregates is significantly accelerated. Moreover, photoluminescence measured at 77 K showed slight red-shift of the five characteristic uranyl emission bands for ZnU-ns in comparison with those of the crystalline ZnU. This work gives the first examples of 2D materials based on 5f-3d heterometallic uranyl phosphonates and illustrates the impact of dimension reduction on their magnetic/optical properties.

show abstract

Section: Chemistry-a European Journalmentioning

confidence: 99%

Layered Uranyl Phosphonates Encapsulating Co(II)/Mn(II)/Zn(II) Ions: Exfoliation into Nanosheets and Its Impact on Magnetic and Luminescent Properties

Wen

Zou

et al. 2022

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

show abstract

“…[8][9][10][11] Among them, cobalt-based MOFs are of particular interest because cobalt ion can show multiple oxidation states, variable coordination numbers and tunable spin states that can be sensitive to environment changes. [12][13][14][15][16][17][18] For example, Dincă et al reported the reversible storage of elemental chlorine and bromine in a robust Co-azolate MOF which operated via redox mechanism. [19] Pardo and Cano et al found that single-ion magnet behavior of a 2D Co-MOF can be tuned by changing the guest aromatic molecules.…”

Section: Introductionmentioning

confidence: 99%

“…Metal‐organic frameworks (MOFs) with their structures and properties responsive to external stimuli, such as gas/guest, [1–3] pressure, [4] temperature [5] and light, [6,7] are very attractive owing to their potential applications in gas storage and separation, drug delivery, sensors, catalysis and molecular devices [8–11] . Among them, cobalt‐based MOFs are of particular interest because cobalt ion can show multiple oxidation states, variable coordination numbers and tunable spin states that can be sensitive to environment changes [12–18] . For example, Dincă et al.…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II)‐dianthracene Frameworks: Assembly, Exfoliation and Properties

Zou

Bao

Huang

et al. 2021

Chemistry An Asian Journal

Self Cite

View full text Add to dashboard Cite

Metal-organic frameworks containing responsive organic linkers are attractive for potential applications in sensors and molecular devices. Herein we report three cobalt (II) phosphonates incorporating responsive dianthracene linkers, namely, Co 2 (amp 2 H 2 ) 2 (H 2 O) 4 • 6H 2 O (MDAF-1), Co 2 (amp 2 )(H 2 O) 4 • 2H 2 O (MDAF-2) and Co-(amp 2 H 2 ) • 2H 2 O • 0.5DMF (MDAF-3), where amp 2 H 4 is prephotodimerized 9-anthrylmethylphosphonic acid. MDAF-1 shows a layer structure in which dinuclear Co 2 (PO 3 H) 2 units are inter-connected by dianthracene ligands. In MDAF-2 and MDAF-3, inorganic chains of corner-sharing {CoO 4 } (or {CoO 6 })and {PO 3 C} are cross-linked by dianthracene ligands into 3D frameworks. All compounds underwent thermo-induced phase transitions, first the de-solvation and then the dedimerization of dianthracene (as well as the release of the remaining solvent molecules for MDAF-2 and -3), associated with magnetic changes. MDAF-1 can be exfoliated into single-layer nanosheets in water which show light-triggered luminescent changes.

show abstract

Syntheses, crystal structures, and fluorescence properties of two new copper phosphonates from hydroxy-functionalized bisphosphonic acid ligand

Wang,

Yang,

Wang

et al. 2024

Journal of Coordination Chemistry

View full text Add to dashboard Cite

Changes in magnetic order through two consecutive dehydration steps of metal-phosphonate diamond chains

Abstract: M3II(hpdpH)2(H2O)6·4H2O (M = Co, Ni) experience identical two-step dehydration processes associated with drastic magnetic changes from paramagnet to antiferromagnet/metamagnetic to ferrimagnet for M = Co, and from antiferromagnet to antiferromagnet to ferrimagnet for M = Ni.

Cited by 3 publications

References 58 publications

Layered Uranyl Phosphonates Encapsulating Co(II)/Mn(II)/Zn(II) Ions: Exfoliation into Nanosheets and Its Impact on Magnetic and Luminescent Properties

Layered Uranyl Phosphonates Encapsulating Co(II)/Mn(II)/Zn(II) Ions: Exfoliation into Nanosheets and Its Impact on Magnetic and Luminescent Properties

Cobalt(II)‐dianthracene Frameworks: Assembly, Exfoliation and Properties

Syntheses, crystal structures, and fluorescence properties of two new copper phosphonates from hydroxy-functionalized bisphosphonic acid ligand

Contact Info

Product

Resources

About