کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1341136 | 1500295 | 2005 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic properties of transition metal complexes with 2,2′-bipyridin-5-yl t-butyl nitroxide Magnetic properties of transition metal complexes with 2,2′-bipyridin-5-yl t-butyl nitroxide](/preview/png/1341136.png)
Complexes [MnII(5bpno)3(ClO4)2], [MnII(5bpno)(CH3OH)2Cl2], [CuII(5bpno)2(ClO4)2], and [CuII(5bpno)Cl2] were prepared, where 5bpno stands for 2,2′-bipyridin-5-yl t-butyl nitroxide. X-ray crystallographic analysis clarified that the Cu ion in [Cu(5bpno)2(ClO4)2] was tetra-coordinate with four nitrogen atoms forming two chelate rings. Magnetic measurements revealed the presence of ferromagnetic couplings in the Mn complexes, whereas the Cu complexes showed antiferromagnetic couplings. Magnetic exchange couplings between the metal and radical spins through the intervening pyridine ring can be explained in terms of the spin-polarization mechanism.
Complexes [MnII(5bpno)3(ClO4)2], [MnII(5bpno)(CH3OH)2Cl2], [CuII(5bpno)2 (ClO4)2], and [CuII(5bpno)Cl2] were prepared, where 5bpno stands for 2,2′-bipyridin-5-yl t-butyl nitroxide. Magnetic measurements revealed the presence of ferromagnetic couplings in the Mn complexes, whereas the Cu complexes showed antiferromagnetic couplings.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 24, Issues 16–17, 17 November 2005, Pages 2593–2598