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 SM ISO690:2012MELNYK, Silvia, PRODIUS, Denis, SHOVA, Sergiu, STOECKLI-EVANS, Helen Margaret, SIMONOV, Yurii A., FEHER, Alexander, GDANIEC, Maria, TURTA, Constantin. Synthesis, crystal structure and magnetic behaviour of novel 4f-2s heterometalic one-dimensional coordination polymers on the base of 2-furan-carboxylic acid
. In: Chemistry Journal of Moldova, 2009, nr. 2(4), pp. 60-67. ISSN 1857-1727. |
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| Chemistry Journal of Moldova | |
| Numărul 2(4) / 2009 / ISSN 1857-1727 /ISSNe 2345-1688 | |
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| Pag. 60-67 | |
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Nine new complexes with the general formula {[Ln2Ba(α-Fur)8(HO)4
]}n, where Ln = Nd3 , Sm3 , Eu3 , Pr3 , Gd3 , Tb3 , Ho3 , Er3 and La3 ; α-Fur ≡ C4H3OCOO, were synthesized and characterized by IR spectra, magnetism, X-ray single crystal and powder diffractions. The X-ray diffraction analysis reveals that all titled compounds are isostructural and possess 1D architecture with Ln ion in an eight-coordination geometry formed by six oxygen atoms from furoate and two oxygen atoms from water molecules. The magnetic behaviour of several synthesised complexes as well as {[Gd2Sr(α-Fur)8(H2O)4]}n was investigated in the temperature range of 1.8-300 K. The magnetic data were interpreted in the HDVV approximation with the exchange coupling constant J = - 0.014 cm-1 that indicates antiferromagnetic interaction in {Gd2Sr}, whereas a ferromagnetic one J = 0.007 cm-1 for {Gd2Ba}.
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| Cuvinte-cheie heteronuclear lanthanide (III) complexes, furancarboxylates ligand, crystal structure, magnetic properties |
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