کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1341110 | 1500295 | 2005 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic and theoretical characterization of a ferromagnetic Mn(III) dimer Magnetic and theoretical characterization of a ferromagnetic Mn(III) dimer](/preview/png/1341110.png)
Reaction of 1,1,1-tris(hydroxymethyl)ethane (H3thme) with the complex [Mn2O2(bpy)4](ClO4)3 produces the dimeric species [Mn2(Hthme)2(bpy)2](ClO4)2 in high yield. Magnetic measurements in the temperature range 1.8–300 K and in fields up to 7 T reveal weak ferromagnetic exchange between the metal centres with J = +2.13 cm−1. A fit of the magnetization data, assuming only the ground state is populated, gives S = 4, g = 1.71 and D = −0.65 cm−1. Low temperature single crystal measurements suggest the co-existence of SMM behaviour and strong intermolecular interactions. Density functional calculations also support a weak exchange interaction between the Mn ions.
Magnetic measurements on the dimeric species [Mn2(Hthme)2(bpy)2](ClO4)2 reveal weak ferromagnetic exchange between the metal centres with J = +2.13 cm−1, S = 4, g = 1.71 and D = −0.65 cm−1. Single crystal measurements suggest the co-existence of SMM behaviour and strong intermolecular interactions.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 24, Issues 16–17, 17 November 2005, Pages 2450–2454