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Inne
Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type - structure and magnetism.
Autorzy
Rok wydania
2008
Czasopismo
Numer woluminu
62
Strony
487-495
DOI
10.2478/s11696-008-0060-9
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
rom a series of pentanuclear, heterobimetallic complexes of the general composition[{Ln(H2O)n}2{Ni(dto)2}3]·xH2O, four complexes (Ln = Gd(III) withn= 4; Ln = Dy(III), Ho(III),or Er(III), withn=5;x= 9–12; dto = 1,2-dithiooxalate) were studied due to their large magneticmoments (up to 14.65 B.M.). The magnetic properties of these complete series were measured atroom temperature and the temperature dependent magnetic properties of the complexes Gd2Ni3,Dy2Ni3,Ho2Ni3,andEr2Ni3were studied at room temperature down to 1.8 K. Whereas the in-tramolecular metal–metal distances were rather long (Ni1—Ni2: 11.0–11.5 ̊A; Ln—Ni: 6.0–6.3 ̊A),relatively short intermolecular metal–metal distances (Ni1—Ni2’: 3.5 ̊A; Er—Er’: 6.0 ̊A) were foundin the crystal lattice, giving rise to weak intermolecular metal–metal interactions. These weak spininteractions were also supported by the EPR spectrum of a powdered sample of the diamagneticallyundiluted Gd2Ni3complex.
Słowa kluczowe
anthanides, atom, 2-dithiooxalate, crystal structure, nickel(II), magnetic susceptibility
Adres publiczny
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