Magnetism‐Structures Relationship of 3,5‐Heptanedione Dy(III) SMMs Based on the Nitrogen‐Containing Auxiliary Ligand
Magnetism‐Structures Relationship of 3,5‐Heptanedione Dy(III) SMMs Based on the Nitrogen‐Containing Auxiliary Ligand
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DOI：
10.1002/slct.201903951
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Yanping Dong;Siqi Fan;Guangming Li
中科院分区：
文献类型：
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作者：
Yanping Dong;Siqi Fan;Guangming Li
通过3，5-庚二酮与氯化镝和辅助配体在室温下的反应，设计并合成了两种新的3，5-庚二酮（β-二酮）镝配合物[Dy（L）3（phen）]（1）和[Dy（L）3（tmphen）]（2）（L=3，5-庚二酮，phen=1，10-菲咯啉，tmphen=3，4，7，8-四甲基-1，10-菲咯啉）. X射线晶体学分析表明，配合物1和2是单核的，Dy（III）离子是八配位的，形成正方反棱柱几何结构。通过元素分析、红外光谱、紫外光谱等手段对配合物1和2进行了表征。磁性研究表明，在零直流磁场下，配合物1和2都是单分子磁体（SMM）。其中，辅助配体对配合物的磁性起着至关重要的调节作用，导致配合物1和2的磁性存在本质上的差异。
Two new 3, 5‐heptanedione (β‐diketonate) dysprosium complexes, namely, [Dy(L)3(phen)] (1) and [Dy(L)3(tmphen)] (2), have been designed and isolated by reactions of 3, 5‐heptanedione with dysprosium chloride and auxiliary ligand under room temperature (L=3, 5‐heptanedione, phen=1, 10‐phenanthroline, tmphen=3, 4, 7, 8‐tetramethyl‐1, 10‐phenanthroline). X‐ray crystallographic analysis reveals that complexes1and2are mononuclear, and the Dy(III) ions are eight coordinated forming the square‐anti‐prismatic geometry. Complexes1and2were characterized by various means including elemental analysis, IR and UV spectroscopy. Magnetic studies indicate that both complexes1and2are single‐molecule magnets (SMMs) under zero dc field. Notably, the auxiliary ligand plays an essential role in regulating their magnetism, which result in the essential magnetism difference between complexes1and2.