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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The construction of dynamic dysprosium-carboxylate ribbons by utilizing the hybrid-ligand conception
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The construction of dynamic dysprosium-carboxylate ribbons by utilizing the hybrid-ligand conception

机译：利用杂交配体构想，施工动态镝 - 羧酸织物织带

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摘要

By utilizing the hybrid-ligand conception, three novel dysprosium complexes Dy(2-py-4-pmc)(L)(H2O) (H2-py-4-pmc = 2-(2-pyridyl)pyrimidine-4-carboxylic acid; L = fumarate (fum, 1), succinate (suc, 2), or pimelate (pim, 3)) have been successfully synthesized. Structural analysis reveals that the dicarboxylate ligands connect 2-py-4-pmc(-)-protected Dy3+ to form one-dimensional molecular ribbons. Magnetic measurements indicate that the three complexes exhibit typical slow magnetic relaxation under a zero dc field with effective reversal barriers U-eff of 180 K, 145 K and 137 K for 1-3, respectively, which is mainly attributed to the strong Ising anisotropy of dysprosium ions induced by the appropriate arrangement of carboxylate groups. Ab initio calculations demonstrate that the charge distribution around dysprosium ions and the magnetic interactions between them are key contributions to their different dynamic behaviour.
机译：利用杂化配体概念，合成了三种新型镝配合物Dy（2-py-4-pmc）（L）（H2O）（H2-py-4-pmc=2-（2-吡啶基）嘧啶-4-羧酸）；L=富马酸（富马酸，1），琥珀酸（suc，2）或吡美拉酸（pim，3））已成功合成。结构分析表明，二羧酸配体连接2-py-4-pmc（-）保护的Dy3+形成一维分子带。磁性测量表明，这三种配合物在零直流电场下表现出典型的慢磁弛豫，1-3的有效反转势垒U-eff分别为180 K、145 K和137 K，这主要归因于羧酸基团的适当排列引起的镝离子的强Ising各向异性。从头算计算表明，镝离子周围的电荷分布和它们之间的磁相互作用是它们不同动力学行为的关键贡献。

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    Fang Yu; Sun Rong; Sun Ai-Huan; Sun Hao-Ling; Gao Song;

  • 作者单位

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci State Key Lab Rare Earth Mat Chem &

    Applicat Coll Chem &

    Mol Engn Beijing 100871 Peoples R China;

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

    Peking Univ Beijing Natl Lab Mol Sci State Key Lab Rare Earth Mat Chem &

    Applicat Coll Chem &

    Mol Engn Beijing 100871 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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