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@article{1602442, author = {Doroshenko, Iaroslav and Buchholz, Axel and Bergerova, Eva Domincova and Plass, Winfried and Pinkas, Jiří}, article_location = {Cambridge}, article_number = {2}, doi = {http://dx.doi.org/10.1039/c9nj05071j}, keywords = {TRANSITION-METAL-COMPLEXES; CLUSTERS; CAGES; GD; SYMMETRY; SHAPE; LANTHANIDES; DESIGN; LN}, language = {eng}, issn = {1144-0546}, journal = {New Journal of Chemistry}, title = {Heterometallic 3d-4f {Co2Gd4} phosphonates: new members of the potential magnetic cooler family}, url = {http://dx.doi.org/10.1039/c9nj05071j}, volume = {44}, year = {2020} }
TY - JOUR ID - 1602442 AU - Doroshenko, Iaroslav - Buchholz, Axel - Bergerova, Eva Domincova - Plass, Winfried - Pinkas, Jiří PY - 2020 TI - Heterometallic 3d-4f {Co2Gd4} phosphonates: new members of the potential magnetic cooler family JF - New Journal of Chemistry VL - 44 IS - 2 SP - 513-521 EP - 513-521 PB - ROYAL SOC. CHEMISTRY SN - 11440546 KW - TRANSITION-METAL-COMPLEXES KW - CLUSTERS KW - CAGES KW - GD KW - SYMMETRY KW - SHAPE KW - LANTHANIDES KW - DESIGN KW - LN UR - http://dx.doi.org/10.1039/c9nj05071j L2 - http://dx.doi.org/10.1039/c9nj05071j N2 - Three new heterometallic phosphonate complexes with a novel 3d-4f metal core {Co2Gd4} were isolated. The reactions between CoCl2, GdCl3, ligand sodium salts, and 2,2 '-bipyridine in methanol solution lead to new unexpected 3d-4f heterometallic complexes, [Na(2)CoIII2Gd(4)(L)(6)(bpy)(2)(OR)(2)]center dot nSolv (L = SAA(3-) (1), BSAA(3-) (2), and NAA(3-) (3); bpy = 2,2 '-bipyridine; OR = OH and OMe; Solv = H2O and MeOH), composed of a rare case of two magnetically independent oxygen bridged Gd2O2 dinuclear units, which are separated by O-P-O bridges. According to the BVS calculations and measured magnetic properties, only Co-III ions are present in the obtained complexes. The magnetic properties of the compounds 1-3 were studied and the entropy changes for the designation of the magnetocaloric effect were calculated. The largest value for the magnetic entropy change -Delta S-M of 20 J kg(-1) K-1 for complex 1 has been found for T-av = 2.25 K and H-f = 5 T. ER -
DOROSHENKO, Iaroslav, Axel BUCHHOLZ, Eva Domincova BERGEROVA, Winfried PLASS and Jiří PINKAS. Heterometallic 3d-4f $\{$Co2Gd4$\}$ phosphonates: new members of the potential magnetic cooler family. \textit{New Journal of Chemistry}. Cambridge: ROYAL SOC. CHEMISTRY, 2020, vol.~44, No~2, p.~513-521. ISSN~1144-0546. Available from: https://dx.doi.org/10.1039/c9nj05071j.
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