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Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type — structure and magnetism
Siebold, Matthias, Korabik, Maria, Schilde, Uwe, Mrozinski, Jerzy and Strauch, Peter Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type — structure and magnetism Chemical Papers, Vol.62, No. 5, 2008, 487-495
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Siebold, Matthias
Korabik, Maria
Schilde, Uwe
Mrozinski, Jerzy
Strauch, Peter
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| Title |
Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type — structure and magnetism
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| Journal name |
Chemical Papers
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| Publication date |
2008
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| Year available |
2008
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| Volume number |
62
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| Issue number |
5
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| ISSN |
0366-6352
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| Start page |
487
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| End page |
495
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2008
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| Language |
english
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| Subject |
250000 Chemical Sciences
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| Abstract/Summary |
From a series of pentanuclear, heterobimetallic complexes of the general composition [{Ln(H2O)n}2{Ni(dto)2}3] · xH2O, four complexes (Ln = Gd(III) with n = 4; Ln = Dy(III), Ho(III), or Er(III), with n = 5; x = 9–12; dto = 1,2-dithiooxalate) were studied due to their large magnetic moments (up to 14.65 B.M.). The magnetic properties of these complete series were measured at room temperature and the temperature dependent magnetic properties of the complexes Gd2Ni3, Dy2Ni3, Ho2Ni3, and Er2Ni3 were studied at room temperature down to 1.8 K. Whereas the intramolecular metal-metal distances were rather long (Ni1-Ni2: 11.0–11.5 Å; Ln-Ni: 6.0–6.3 Å), relatively short intermolecular metal-metal distances (Ni1-Ni2′: 3.5 Å; Er-Er′: 6.0 Å) were found in the crystal lattice, giving rise to weak intermolecular metal-metal interactions. These weak spin interactions were also supported by the EPR spectrum of a powdered sample of the diamagnetically undiluted Gd2Ni3 complex.
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