Reexamination of the magnetic properties of Cu2(dca)4(2,5-me2pyz) {dca = dicyanamide; me2pyz = dimethylpyrazine}:: isolated spin-1/2 dimers versus long-range magnetic ordering

被引：23
|
作者：
Manson, JL
Schlueter, JA
Koo, HJ
Whangbo, MH
机构：
[1] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA
[2] Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA
[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[4] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
来源：
INORGANIC CHEMISTRY | 2004年 / 43卷 / 13期
关键词：
D O I：
10.1021/ic0354769
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The magnetic properties of Cu-2(dca)(4)(2,5-me(2)pyz) have been reexamined. The extended structure of Cu-2(dca)(4)(2,5-me(2)pyz) can be viewed in terms of Cu-2(2,5-me(2)pyz)(4+) dimer units interconnected via mu(1,5)-dca ligands. The bulk magnetic susceptibility chi(T) and the isothermal M(H) of Cu-2(dca)(4)(2,5-me(2)pyz) are shown to be well described by an isolated dimer model. This finding was confirmed by carrying out a spin dimer analysis based on tight-binding calculations, which shows that the 2,5-me(2)pyz ligand provides a substantial spin exchange interaction between the Cu2+ ions while the dca ligands do not.
引用
收藏
页码：4007 / 4011
页数：5
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