β-二酮稀土配合物单离子磁体

项目名称： β-二酮稀土配合物单离子磁体

项目编号： No.21471051

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 李光明

作者单位： 黑龙江大学

项目金额： 90万元

中文摘要： 由于单核稀土配合物单分子磁体（单离子磁体）结构简单，影响稀土离子磁各向异性的因素相对较少，所以单核稀土配合物单离子磁体的研究受到了广泛的关注。虽然已知稀土单离子磁体的磁各向异性受配位场和稀土离子配位对称性的影响，但是配位场和配位对称性对稀土离子磁各向异性的影响微妙复杂，尚不能以简单易懂的模型解释。 最近的研究发现beta-二酮配体在调控稀土离子磁各向异性方面具有促进作用，多数二酮稀土配合物表现为单离子磁体，且某些二酮稀土配合物通过辅助配体的调控后能实现高达187K的磁各向异性能垒。 我们长期研究beta-二酮稀土配合物的合成、结构和性能，对beta-二酮稀土配合物的合成和结构非常熟悉。计划开展beta-二酮稀土配合物单离子磁体的研究。拟通过系统筛选二酮和辅助配体以实现调控稀土离子的配位场和配位对称性，建立结构和磁性的构效关系，以实现调控beta-二酮稀土配合物单离子磁体的目的。

中文关键词： 稀土配合物；设计合成；单分子磁体；构效关系；β-二酮

英文摘要： Single ion magnets (SIMs) of of mononuclear lanthanide complexes have attracted extensive attentions attributed to the simple structures of mononuclear lanthanide complexes, which results in the relatively less parameters affecting the magnetic anisotropy of mono-lanthanide ions. Although it is known that the coordination field and the symmetry of lanthanide ion dominate the magnetic anisotropy of mono-lanthanide ion, it is very intricacy and subtlety. There is still no a simple model to explain. It is found recently that the beta-diketones as a ligand play essential roles on regulating the magnetic anisotropy of mononuclear lanthanide ion. Most beta-diketones lanthanide complexes exhibit the feature of SIMs, especially, the anisotropy barriers of certain beta-diketones lanthanide complexes were reveal up to 187K by way of tuning the adjuvant ligand. We have been studying the synthesis, structure and properties of beta -diketones lanthanide complexes for several years and knowing the synthesis and structure of beta-diketones lanthanide complexes very well. Therefore, we are studying on the synthesis, structure and single ion magnetism of beta-diketones lanthanide complexes. To realize the target of tuning the single ion magnetism of beta-diketones lanthanide complexes, the beta-diketones and ancillary ligands are going to be systemic designed to modulate the coordiantion field and symmetry of lanthanide ions and developing the corelationship of structure and mangetism.

英文关键词： lanthanide complexes;designed synthesis;single ion magnet;corelationship of structure and magnetism;β-diketone