Alternate Synthetic Pathway Leading to Isolation of a Dinuclear Single‐Molecule Magnet

Wei, Jun‐Yu; Hsu, Ting-Jung; Wang, Chia‐Wei; Kuo, Che-Jung; Lin, Po‐Hung

doi:10.1002/ejic.201800327

Cited by 4 publications

(2 citation statements)

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“…Due to the large space volume of the bridged Schiff base ligand filling the coordination site, the complexes formed a centrosymmetric tetranuclear system, preventing the formation of large metal clusters. 44 The formation of different nuclear complexes could be easily observed by fragmentation of the synthesis process. This avoided the regulation of complex processes and provided further guidance for the formation of advanced nuclear.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In terms of the cis -Schiff base ligand, the phenoxy ion continued to participate in the coordination and played a bridging role in joining the two Dy 2 L 3 systems, thus forming 2 . Due to the large space volume of the bridged Schiff base ligand filling the coordination site, the complexes formed a centrosymmetric tetranuclear system, preventing the formation of large metal clusters . The formation of different nuclear complexes could be easily observed by fragmentation of the synthesis process.…”

Section: Resultsmentioning

confidence: 99%

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Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts

Li,

Shi,

et al. 2024

Inorg. Chem.

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Using the Schiff base ligand H 2 L-pyra (N′-(2hydroxybenzoyl)pyrazine-2-carbohydrazonamide) with multiple dentate sites, the trinuclear Dy III -based complex [Dy 3 (HLpyra) 2 (L-pyra) 2 (CH 3 COO) 3 ]•2H 2 O (1) was synthesized. By analyzing the fragmented assembly process and fine-tuning the b r i d g i n g a n i o n s , c o m p l e x [ D y 4 ( H L -p y r a ) 2 ( L -p y ra) 4 2) with different nuclear numbers was successfully synthesized. Magnetic studies demonstrated that 1 did not exhibit magnetic relaxation behavior under the external field; however, 2 exhibited zero-field single-molecule magnetic relaxation behavior with an effective energy barrier (U eff ) of 197.44 K. This is attributed to the improved anisotropy of the single ion after the normalization of the crystal structure, thus realizing the molecular magnetic switching. Moreover, magnetic dilution analysis of 2 demonstrated that the weak magnetic interaction between metal ions inhibited the occurrence of quantum tunneling of magnetization (QTM), resulting in high-performance single-molecule magnet (SMM) behavior. The reasons for the magnetic difference between these two complexes were analyzed using ab initio calculation and magneto-structural correlations. This study provides a reasonable prediction of the ideal configuration of the approximately parallelogram Dy III -based SMMs, thus offering an effective approach for synthesizing Dy 4 complexes with excellent properties.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts

Li,

Shi,

et al. 2024

Inorg. Chem.

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Effect of nuclearity and symmetry on the single-molecule magnets behavior of seven-coordinated β-diketonate Dy(III) complexes

et al. 2019

Journal of Solid State Chemistry

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Crystal structure and NMR spectroscopic characterization of 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide

Talmaci,

Dragancea,

Gorincioi

et al. 2023

Chem. J. Mold.

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The solid-state structure of a symmetrical carbohydrazone, namely 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide was determined by X-ray single crystal diffraction method. Compound 1 crystallizes in the monoclinic space group P21/n with unit cell parameters a= 10.1198(6), b= 22.7847(11), c= 15.1738(10) Å, β= 100.458(6)°, Z= 4, V= 3440.6(3) Å3, R1= 0.0540. Crystal structure of 1 is defined by two crystallographic independent molecules, which are bonded via N–H···O hydrogen bond. The organic molecules are as keto tautomers with respect to the carbamide fragment, and adopt the anti conformation. 1D and 2D NMR experiments have argued on the presence of the title compound in DMSO-d6 solution mostly as keto tautomer in syn conformation, and enol-imino form when considering o-vanillin residue.

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Alternate Synthetic Pathway Leading to Isolation of a Dinuclear Single‐Molecule Magnet

Cited by 4 publications

References 50 publications

Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts

Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts

Effect of nuclearity and symmetry on the single-molecule magnets behavior of seven-coordinated β-diketonate Dy(III) complexes

Crystal structure and NMR spectroscopic characterization of 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide

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Alternate Synthetic Pathway Leading to Isolation of a Dinuclear Single‐Molecule Magnet

Cited by 4 publications

References 50 publications

Structures and Single-Molecule Magnet Behavior of Dy3 and Dy4 Clusters Constructed by Different Dysprosium(III) Salts

Structures and Single-Molecule Magnet Behavior of Dy3 and Dy4 Clusters Constructed by Different Dysprosium(III) Salts

Effect of nuclearity and symmetry on the single-molecule magnets behavior of seven-coordinated β-diketonate Dy(III) complexes

Crystal structure and NMR spectroscopic characterization of 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide

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Product

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Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts

Structures and Single-Molecule Magnet Behavior of Dy₃ and Dy₄ Clusters Constructed by Different Dysprosium(III) Salts