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• 作者：Miguel Clemente-Leó ; n ; Eugenio Coronado ; Carlos J. Gó ; mez-Garc&iacute ; a ; and Alejandra Soriano-Portillo
• 刊名：Inorganic Chemistry
• 出版年：2006
• 出版时间：July 10, 2006
• 年：2006
• 卷：45
• 期：14
• 页码：5653 - 5660
• 全文大小：215K
• 年卷期：v.45,no.14(July 10, 2006)
• ISSN：1520-510X

文摘

The synthesis, structure, and physical properties of a novel series of oxalate-based bimetallic magnets obtained byusing the Ir(ppy)₂(bpy)]⁺ cation as a template of the bimetallic [M^IIM^III(ox)₃]^- network are reported. The compoundscan be formulated as [Ir(ppy)₂(bpy)][M^IICr^III(ox)₃]·0.5H₂O (M^II = Ni, Mn, Co, Fe, and Zn) and [Ir(ppy)₂(bpy)]-[M^IIFe^III(ox)₃]·0.5H₂O (M^II = Fe, Mn) and crystallize in the chiral cubic space group P4₁32 or P4₃32. They show thewell-known 3D chiral structure formed by M^II and M^III ions connected through oxalate anions with [Ir(ppy)₂(bpy)]⁺cations and water molecules in the holes left by the oxalate network. The M^IICr^III compounds behave as softferromagnets with ordering temperatures up to 13 K, while the Mn^IIFe^III and Fe^IIFe^III compounds behave as a weakferromagnet and a ferrimagnet, respectively, with ordering temperatures of 31 and 28 K. These values representthe highest ordering temperatures so far reported in the family of 3D chiral magnets based on bimetallic oxalatecomplexes.