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| 基于含氮杂环类配体的二价铁磁性配合物的合成与表征
摘要
近些年，科技的飞速发展以及社会的不断进步, 现有的一些功能材料己经不能够满足人们的需求, 目前研究和开发分子基磁性材料已成为研究的热点。通过利用配位化学和晶体工程来设计组装有机/无机杂化材料, 是构建功能分子材料的有效方法之一。与传统的磁性材料相比，分子基磁性材料具有密度小、不导电、可塑性强、易加工、易复合等特点，在信息存储、光磁及电磁材料、分子电子器件等相关领域都具有广阔的应用前景。
分子基磁性材料大致可分为单分子磁体、单链磁体等分子纳米磁体和磁双稳态材料，其中次双稳态材料中自旋交叉配合物的研究最为广泛。本文采用不同的合成方法和结晶方法来设计合成分子基材料。同时，进一步对所合成材料的晶体结构、磁学性质进行了表征和研究。
本文主要研究内容如下：
关键词：自旋交叉；磁性材料；晶体结构；磁学性质；
Abstract
In recent years, the rapid development of science and technology and the continuousprogress of society have made some existing materials unable to meet people's needs. At present, the research and development of molecular-based magnetic materials has become a research focus. The use of coordination chemistry and crystal engineering to assemble organic/inorganic hybrid materials is one of the effective methods to construct functional molecular materials.Compared with traditional magnetic materials,molecular-based magnetic materials have the characteristics of low density, non-conductivity, strong plasticity, easy processing, easy compounding, etc., and have broad application prospectin related fields such as information storage, opto-magnetic and electromagnetic materials, and molecular electronic devices.
Molecular-based magnetic materials can be roughly divided into single-molecule magnets,single-stranded magnets and other molecular nano-magnets and magnetic bistable materials. Among them, spin-crossing complexes are the most widely studied in sub-bistable materials.This article uses different synthesis methods and crystallization methods to design molecular-based materials. At the same time, the crystal structure,magnetic properties of the synthesized materials were further characterized and studied.
The main research contents of this paper are as follows:
The first chapter, the introduction part,introduces the spin-crossing phenomenon,the characterization methods and synthesis strategies of spin-crossing complexes, focusing on the research progress of spin-crossing complexes of different dimensions, and the factors that affect the properties of spin-crossing. In addition, the research ideas of this article and the significance of topic selection are also explained.
thods and crystallization methods to design molecular-based materials.At the same time, the crystal structure,magnetic properties of the synthesized materials were further characterized and studied.
The main research contents of this paper are as follows:
The first chapter, the introduction part,introduces the spin-crossing phenomenon,the characterization methods and synthesis strategies of spin-crossing complexes, focusing on the research progress of spin-crossing complexes of different dimensions, and the factors that affect the properties of spin-crossing. In addition, the research ideas of this article and the significance of topic selection are also explained.
Chapter two, using the bidentate pyridine ligand N,N'-bis-(4-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide (dpni) and Fe(II) and K [Au(CN)2],designed and synthesized a new type of three-dimensional Hoffman-type compound [Fe(dpni){Au(CN)2}2]·4CH3CN by a liquid-liquid slow diffusion method at room temperature, and The crystal structure of the compound was characterized by infrared spectroscopy, elemental analysis, and single crystal X-ray diffraction, and the magnetic properties of the compound were studied by the temperature-variable magnetic susceptibility test.
Chapter three, monodentate pyridine ligands isoquinoline (isoq),Fe(II) and K2[Pt(CN)4](K2[Ni(CN)4])by a liquid-liquid slow diffusion method at room temperature was designed and synthesized two new two-dimensional Hoffman-type compounds {Fe(isoq)2[Pt(CN)4]} and {Fe(isoq)2[Ni(CN)4]}, using infrared spectroscopy , Elemental analysis, single crystal X-ray diffraction to characterize the crystal structure of these two compounds, the magnetic properties of the two compounds were studied by temperature-variable susceptibility testing.
In chapter four, two novel zero-dimensional mononuclear compounds [Fe(TBZ) (HTBZ)2]ClO4 and [Fe(TBZ)2SO4H2O] were designed and synthesized by hydrothermal method with bidentate benzimidazole ligand 2-(4-thiazolyl)benzimidazole and Fe(II) . The crystal structures of the two compounds were characterized by infrared spectroscopy, elemental analysis, and single crystal X-ray diffraction. The temperature-varying magnetic susceptibility test investigatedthe magnetic propertiesthe of the compound [Fe(TBZ)(HTBZ)2]ClO4 .
Chapter five, summary and outlook .
Keywords:Spin Crossover; Magnetic Materials; Crystal Structure; Magnetic Propertie
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