Structural studies of a dinuclear (Cu, Gd) and two trinuclear (Cu2, Ln) complexes (Ln = Ce, Er).: Magnetic properties of two original (Cu, Gd) complexes

被引：83
|
作者：
Costes, JP [1 ]
Dahan, F [1 ]
Dupuis, A [1 ]
Laurent, JP [1 ]
机构：
[1] CNRS, Chim Coordinat Lab, UPR 8241, F-31077 Toulouse, France
来源：
NEW JOURNAL OF CHEMISTRY | 1998年 / 22卷 / 12期
关键词：
D O I：
10.1039/a803125h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
With the aim of increasing the number of structurally characterized dimetallic (Cu-II, Ln(III)) complexes, we have obtained a strictly dinuclear (Cu-II, Gd-III) complex 1 in which, according to structural data, the two metal ions are triply bridged. Then, we have investigated the capability of Cusalen precursors for complexing lanthanide ions. Structural and magnetochemical studies show that dinuclear entities with a CuO(2)Ln bridging network can only be isolated with the heavier lanthanide ions such as gadolinium or erbium (complexes 2, 3 and 4) while trinuclear (CuO(2)LnO(2)Cu) complexes are obtained in the case of lighter Ln(III) ions, such as cerium (complex 5) for example. Ferromagnetic interactions with J values of 4.2 and 3.5 cm(-1) characterize complexes 1 and 2, respectively.
引用
收藏
页码：1525 / 1529
页数：5
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