Four New Lanthanide−Nitronyl Nitroxide (LnIII = PrIII, SmIII, EuIII, TmIII) Complexes and a TbIII Complex Exhibiting Single-Mole
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- 作者：Jin-Xia Xu ; Yue Ma ; Dai-zheng Liao ; Gong-Feng Xu ; Jinkui Tang ; Chao Wang ; Na Zhou ; Shi-Ping Yan ; Peng Cheng ; Li-Cun Li
- 刊名：Inorganic Chemistry
- 出版年：2009
- 出版时间：September 21, 2009
- 年：2009
- 卷：48
- 期：18
- 页码：8890-8896
- 全文大小：801K
- 年卷期：v.48,no.18(September 21, 2009)
- ISSN：1520-510X
文摘
Five new complexes based on rare-earth-radical [Ln(hfac)3(NIT-5-Br-3py)]2 (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.