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通过十三个金属-金属距离的反铁磁相互作用在异金属一维链中

Kazuhiro Uemura¹, Tomonori Adachi¹, Atsushi Takamori¹

¹Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan.

Angewandte Chemie (International ed. in English)

|June 6, 2024

概括

研究人员创造了一种具有直接金属对金属键的新型磁性一维链. 这种由,金和组成的结构表现出强烈的磁交换相互作用.

科学领域:

无机化学无机化学有机化学
材料科学材料科学材料科学
固态化学固态化学

背景情况:

直接的金属-金属键对于新的电子和磁性特性至关重要.
一维 (1D) 协调聚合物具有独特的结构和功能特性.

研究的目的:

合成一种具有直接金属-金属键的新型异金属1D链.
研究合成链的磁性特性和结构特征.

主要方法:

使用[Rh2(O2CCH3)4]和[Pt2Ni(piam) 4 ((NH3) 4) 前体合成异金属链.
1D链结构和金属对金属相互作用的表征.
通过电子磁共振 (EPR) 光谱分析磁交换相互作用.

主要成果:

一个具有直接金属对金属键的1D对齐链 [-Rh(+2) -Rh(+2) -Pt(+2) -Ni(+2) -Pt(+2) ] 已成功合成.
由于面对面堆叠,该链表现出直立的脊柱,Ni原子大约来自四种不同金属的13 Å.
在Ni原子之间通过二磁性Pt-Rh-Rh-Pt键观察到强烈的反铁磁交换相互作用 (J=-37.9 cm-1).

结论:

该研究表明,成功构建了一种具有可调节磁性特性的新型异金属1D链.
在 σ*(dz2) 轨道上的 HOMO-LUMO 相互作用是该系统中直接形成金属-金属键的关键.
这些发现为设计具有特定电子结构的先进磁性材料打开了道路.

关键词:

反铁磁相互作用的反铁磁相互作用链条结构链条结构链条结构不同金属复合体的复合体.金属与金属的相互作用金金金是什么意思

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