Xu Jin-Xia, Ma Yue, Liao Dai-zheng, Xu Gong-Feng, Tang Jinkui, Wang Chao, Zhou Na, Yan Shi-Ping, Cheng Peng, Li Li-Cun
Department of Chemistry, Nankai University, Tianjin 300071, P. R. China.
Inorg Chem. 2009 Sep 21;48(18):8890-6. doi: 10.1021/ic901169p.
Five new complexes based on rare-earth-radical Ln(hfac)(3)(NIT-5-Br-3py) (Ln = Pr (1), Sm (2), Eu (3), Tb (4), Tm (5); hfac = hexafluoroacetylacetonate; NIT-5-Br-3py = 2-(4,4,5,5-tetramethyl-3-oxylimidazoline-1-oxide)-5-bromo-3-pyridine) have been synthesized and characterized by X-ray crystal diffraction. The single-crystal structures show that these complexes have similar structures, in which a NIT-5-Br-3py molecule acts as a bridging ligand linking two Ln(III) ions through the oxygen atom of the N-O group and nitrogen atom from the pyridine ring to form a four-spin system. Both static and dynamic magnetic properties were measured for complex 4, which exhibits single-molecule magnetism behavior.
基于稀土自由基Ln(hfac)(3)(NIT-5-Br-3py)（Ln = Pr (1)、Sm (2)、Eu (3)、Tb (4)、Tm (5)；hfac = 六氟乙酰丙酮；NIT-5-Br-3py = 2-(4,4,5,5-四甲基-3-氧化咪唑啉-1-氧化物)-5-溴-3-吡啶）合成了五种新型配合物，并通过X射线晶体衍射对其进行了表征。单晶结构表明这些配合物具有相似的结构，其中一个NIT-5-Br-3py分子作为桥联配体，通过N-O基团的氧原子和吡啶环上的氮原子连接两个Ln(III)离子，形成四自旋体系。对配合物4测量了静态和动态磁性，其表现出单分子磁性行为。
