一个线性{FeIII2NiII}集群,一个结构上密切相关的近1D{FeIII2NiII}链
Emmanouil K Charkiolakis1, David Gracia1, Marc Ubach I Cervera1
1Universidad de Zaragoza, Instituto de Nanociencia y Materiales de Aragón, SPAIN.
Chemistry (Weinheim an der Bergstrasse, Germany)
|May 20, 2025
概括
合成了两种新的铁异金属化合物. 尽管结构相似,但三核集群表现出铁磁相互作用,而准-1D聚合物表现出反铁磁行为.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 磁电化学 磁电化学 磁电化学
背景情况:
- 希夫基联结体是构建金属复合物的多功能构建块.
- 异金属集群和协调聚合物提供可调节的磁性.
- 了解多核金属系统中的结构属性关系至关重要.
研究的目的:
- 合成和描述新型三核异金属集群和准1D协调聚合物.
- 调查聚合物和聚合物之间的结构差异和相似之处.
- 探索由不同的结构安排产生的磁性特性.
主要方法:
- 使用铁 (III) 化物, (II) 化物,2-氧纳甲基和氨基酸 (甘氨酸或甲基氨酸) 的溶热合成.
- 使用X射线衍射的结果集群和聚合物的结构特征.
- 测量磁感应度以确定磁相互作用.
主要成果:
- 一个三核异金属集群 [Fe2Ni(L1) 4 ((MeOH) 4) ] (1) 和一个准-1D协调聚合物 {[Fe2Ni (((L2) 4 ((MeOH) 2) n} (2) 的形成.
- 综合体1有一个线性{Fe2Ni}三金属单位.
- 复合体2由重复的线性{Fe2Ni}单元组成,形成一个准1D链,复合体1的主导铁磁相互作用,复合体2的主导反铁磁相互作用.
结论:
- 氨基酸配体的选择 (甘氨酸与甲基氨酸) 决定了离散集群或1D聚合物的形成.
- 聚合物的重复单元和离散集群之间存在着显著的结构相似性.
- 磁性行为 (铁磁与反铁磁) 的显著差异来自不同的超分子排列.
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