Stepwise assembly of heterometallic 3d–4f chain exhibiting slow magnetic relaxation

Yu, Mei‐Hui; Jiang, Xue; Han, Song‐De; Wang, Qing‐Lun; Bu, Xian‐He

doi:10.1016/j.cclet.2016.01.001

Cited by 9 publications

(1 citation statement)

References 26 publications

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“…In order to investigate the effect of counteranions on the crystal morphology and properties of the lanthanide/pemp compounds, herein we select different dysprosium salts, Dy(NO 3 ) 3 , DyCl 3 , DyBr 3 , and Dy(CF 3 SO 3 ) 3 , to react with pempH 2 under similar hydrothermal conditions. The dysprosium ion is chosen because of the previous success by using this ion in constructing single ion magnets (SIM) and single molecule magnets (SMM) owing to its large magnetic anisotropy arising from strong spin–orbit coupling and its Kramers ground state. − Consequently, four pairs of homochiral compounds are obtained with formulas R -, S -[Dy 3 (pempH 2 ) 2 (pempH) 7 ] 2 (NO 3 ) 4 ·12H 2 O ( R -1 , S -1 ), R -, S -[Dy 3 (pempH 2 ) 2 (pempH) 7 ]Cl 2 ·2H 2 O ( R -2 , S -2 ), R -, S -[Dy 3 (pempH 2 ) 2 (pempH) 7 ]Br 2 ·1.5H 2 O ( R -3 , S -3 ), and R -, S -[Dy 11 (pempH 2 ) 6 (pempH) 27 ](CF 3 SO 3 ) 6 ·22H 2 O ( R -4 , S -4 ). All show positively charged chain structures with the counteranions reside between the chains.…”

Section: Introductionmentioning

confidence: 99%

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Huang

et al. 2018

Inorg. Chem.

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Four pairs of enantiomeric dysprosium(III) phosphonates, namely, R- or S-[Dy(pempH)(pempH)](NO)·12HO ( R-1 or S-1), R- or S-[Dy(pempH)(pempH)]Cl·2HO ( R-2 or S-2), R- or S-[Dy(pempH)(pempH)]Br·2HO ( R-3 or S-3), and R- or S-[Dy(pempH)(pempH)](CFSO)·22HO ( R-4 or S-4) are reported, where R- or S-pempH represent R- or S-(1-phenylethyl)amino] methylphosphonic acid. All show homochiral chain structures, charge-balanced by counteranions. A comparison of the crystal morphologies of the R-isomers reveals that the overall shapes are quite similar for the four compounds, but the aspect ratio changes remarkably following the sequence: R-1 < R-2 < R-3 < R-4. The sequence is in agreement with the decreasing interchain interactions related to different counteranions, which is rationalized by molecular simulations. The counteranions also influence the intrachain structures and the local coordination environments of the Dy ions. As a result, compounds R-2 and R-3 exhibit distinct dual relaxation processes at zero dc field with the effective energy barriers for the slow- and fast-relaxation being 79.1 and 37.6 K for R-2, and 80.0 and 39.1 K for R-3, respectively. For compounds R-1 and R-4, however, slow magnetic relaxation is also observed at zero dc field but without the appearance of maxima down to 1.8 K.

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Section: Introductionmentioning

confidence: 99%

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Huang

et al. 2018

Inorg. Chem.

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Hexanuclear Co₄Dy₂, Zn₄Dy₂, and Co₄Y₂ Complexes with Defect Tetracubane Cores: Syntheses, Structures, and Magnetic Properties

Yepes

et al. 2021

Chemistry An Asian Journal

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A hexanuclear heterometallic cluster of composition [Dy2Co4(L)4(NO3)2(OH)4(C2H5OH)2] ⋅ 2 C2H5OH (1) was synthesized by employing a Schiff base 2‐(((2‐hydroxy‐3‐methoxybenzyl) imino)methyl)‐4‐methoxyphenol (H2L) as ligand and utilizing Dy(NO3)3 ⋅ 6H2O and Co(NO3)2 ⋅ 6H2O as metal ion sources. X‐ray single‐crystal diffraction analysis indicated that complex 1 contains a defect tetracubane core and possesses central symmetric structure, with two DyIII ions being in the central body position of the molecule and four CoII ions being arranged at the outer sites. Magnetic studies reveal that complex 1 behaves as single‐molecule magnet (SMM) with energy barrier of 27.50 K. To investigate the individual contribution of DyIII and CoII ions to the SMM behavior, another two complexes of formulae [Dy2Zn4(L)4(NO3)2(OH)4] ⋅ 4CH3OH (2) and [Y2Co4(L)4(NO3)2(OH)4(C2H5OH)2] ⋅ 2 C2H5OH (3) were prepared. Complexes 1 and 3 are isomorphous. The coordination geometries of DyIII ions in 1 and 2 are different. The DyIII ions are eight‐coordinated in 2 and nine‐coordinated in 1. Complex 2 exhibits SMM behavior with energy barrier of 69.67 K, but complex 3 does not display SMM property. These results reveal that the SMM behaviors of 1 and 2 are mainly originated from DyIII ions. It might be the higher symmetry of DyIII ions in 2 that results in the higher energy barrier.

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A one‐dimensionalCd‐Eucoordination polymer with open‐chain ether Schiff base ligand and 4,4′‐bipyridine: Synthesis, structure, luminescence property, and antioxidation activities

Dong

Jiang

et al. 2021

J Chinese Chemical Soc

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A new Cd-Eu coordination polymer (CP) with open-chain ether Schiff base ligand bis(3-methoxysalicylidene)-3-oxapentane-1,5-diamine (H 2 L) and 4,4 0 -bipyridine (bipy), with composition [CdEuL(bipy)(NO 3 ) 3 ] n , has been synthesized by interfacial diffusion method and further performed structural characterization. The structure analysis revealed that Cd-Eu CP is an infinite onedimensional zigzag coordination polymer formed by CdEuL secondary units through symmetrical coordination bridging bipy. Luminescence property of the Cd-Eu CP in solid state was also studied. It has been found that the emission spectra of the Cd-Eu CP exhibit corresponding Eu(III) ion characteristic emission peaks. Antioxidation activities of the ligand and the Cd-Eu CP were also studied, showing that the antioxidant activities of the Cd-Eu CP were better than that of H 2 L. All provide an irreplaceable reference for the study of the properties of one-dimensional chain d-f coordination polymers. K E Y W O R D S 4,4 0 -bipyridine, antioxidation activities, crystal structure, d-f coordination polymer, luminescence, open-chain ether Schiff base ligand

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Stepwise assembly of heterometallic 3d–4f chain exhibiting slow magnetic relaxation

Cited by 9 publications

References 26 publications

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Hexanuclear Co₄Dy₂, Zn₄Dy₂, and Co₄Y₂ Complexes with Defect Tetracubane Cores: Syntheses, Structures, and Magnetic Properties

A one‐dimensionalCd‐Eucoordination polymer with open‐chain ether Schiff base ligand and 4,4′‐bipyridine: Synthesis, structure, luminescence property, and antioxidation activities

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Stepwise assembly of heterometallic 3d–4f chain exhibiting slow magnetic relaxation

Cited by 9 publications

References 26 publications

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties

Hexanuclear Co4Dy2, Zn4Dy2, and Co4Y2 Complexes with Defect Tetracubane Cores: Syntheses, Structures, and Magnetic Properties

A one‐dimensionalCd‐Eucoordination polymer with open‐chain ether Schiff base ligand and 4,4′‐bipyridine: Synthesis, structure, luminescence property, and antioxidation activities

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Hexanuclear Co₄Dy₂, Zn₄Dy₂, and Co₄Y₂ Complexes with Defect Tetracubane Cores: Syntheses, Structures, and Magnetic Properties