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氰根桥连铁配合物的合成及其磁性研究

作者:完美论文网  来源:www.wmlunwen.com  发布时间:2021/3/5 15:43:10  

摘要:人们一直致力于合成一些具有结构微观可调、性质宏观复合的多功能分子基磁性材料。在这一类化合物中我们不仅可以发现基础科学研究领域新的物理现象,还能探索其在分子开关、高密度信息存储等领域的应用前景。分子磁性材料中最具代表性的一类化合物是具有顺磁性金属离子的金属配合物,这些配合物分子可以形成零维、一维、二维、三维分子材料。本文着重研究氰根类分子磁性材料。氰根基团中碳氮三键距离很短(0.115 nm左右),是目前较短的双原子桥基。氰根作为桥连基团,具有优异的电子传导能力,这有利于传递磁相互作用。故而,本论文试图通过设计合成各种有机配体,将其与三氰基金属构筑单元和过渡金属进行自组装,制备具有新颖结构和特殊性能的氰根桥连金属配合物,并通过晶体结构,红外光谱,磁性测试进行表征。

关键词:分子基磁性材料; 磁性能; 氰根桥连; 自组装

Abstract: Molecular magnetic materials that possess switchable and cooperative multi-functions have long been pursued by scientists, because the simultaneous properties can not only result in novel physical phenomenon in basic science, but also increase the performance of applicable devices in switches, sensors and high density information storage. Its property lies in the compound with molecular magnetic exchange on the microscopic level, macroscopic ferromagnetic and ferrimagnetic. The most representative class of compounds in molecular magnetic materials are metal complexes with paramagnetic metal ions. These complex molecules can form zero-dimensional, one-dimensional, two-dimensional, and three-dimensional molecular materials. This article focuses on cyanide molecular magnetic materials. Cyanide itself is very short (about 0.115 nm), and it is currently a short diatomic bridge. As a bridging group, cyanide has excellent electron conductivity, which is conducive to the transfer of magnetic interactions. Therefore, this paper attempts to synthesize various organic ligands by design, self-assemble them with tricyanometallic building blocks and transition metals, and characterize them by x-ray diffraction analysis, infrared spectroscopy, and magnetic data.

Key words: Molecular-based magnetic materials; magnetic properties; cyanide-bridged; self-assembly

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