Isomorphous replacement of MII ions in MII-GdIII dimers (MII = CuII, MnII, NiII, CoII, ZnII): magnetic studies of the products

被引：47

作者：

Georgopoulou, Anastasia N. ^{[1
]}

Adam, Rosa ^{[2
]}

Raptopoulou, Catherine P. ^{[1
]}

Psycharis, Vassilis ^{[1
]}

Ballesteros, Rafael ^{[2
]}

Abarca, Belen ^{[2
]}

Boudalis, Athanassios K. ^{[1
]}

机构：

[1] NCSR Demokritos, Inst Mat Sci, Aghia Paraskevi 15310, Paraskevi Attik, Greece

[2] Univ Valencia, Dept Quim Organ, Fac Farm, E-46100 Valencia, Spain

来源：

DALTON TRANSACTIONS | 2010年 / 39卷 / 20期

关键词：

DINUCLEAR COMPLEXES; CRYSTAL-STRUCTURE; ENERGY-LEVELS; II/GD-III; LN; EU; DY; FERROMAGNETISM; CHEMISTRY; TB;

D O I：

10.1039/b925525g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complexes [(MGdIII)-Gd-II{pyCO(OEt)pyC(OH)(OEt)py}(3)](ClO4)(2)center dot EtOH [M-II = Cu-II (1), Mn-II (2), Ni-II (3), Co-II (4) and Zn-II (5)] crystallize in the monoclinic Cc space group and contain one hexacoordinate M-II ion and one enneacoordinate Gd-III ion, bridged by three {pyCO(OEt)pyC(OH)(OEt)py}(-) ligands. Magnetic susceptibility measurements indicate a ferromagnetic interaction for 1 and antiferromagnetic interactions for 2-4. Using the (H) over cap = -J (S) over cap GdIII (S) over cap MII spin Hamiltonian formalism, fits to the magnetic susceptibility data yielded J values of +0.32 cm(-1) for 1, -1.7 cm(-1) for 2, and -0.22 cm(-1) for 3. In complex 4, the orbital contributions of Co-II precluded the determination of the magnetic coupling. The complex follows the Curie-Weiss law with theta = -2.07 K (-1.44 cm(-1)).

引用

页码：5020 / 5027

页数：8

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