Heterometallic 3d-4f {Co2Gd4} phosphonates: new members of the potential magnetic cooler family

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. 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.

Basic information

• Original name: Heterometallic 3d-4f {Co2Gd4} phosphonates: new members of the potential magnetic cooler family
• Authors: DOROSHENKO, Iaroslav (804 Ukraine, belonging to the institution), Axel BUCHHOLZ (276 Germany), Eva Domincova BERGEROVA (203 Czech Republic), Winfried PLASS (276 Germany) and Jiří PINKAS (203 Czech Republic, guarantor, belonging to the institution).
• Edition: New Journal of Chemistry, Cambridge, ROYAL SOC. CHEMISTRY, 2020, 1144-0546.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10400 1.4 Chemical sciences
• Country of publisher: United Kingdom of Great Britain and Northern Ireland
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 3.591
• RIV identification code: RIV/00216224:14310/20:00115185
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1039/c9nj05071j
• UT WoS: 000504433000026
• Keywords in English: TRANSITION-METAL-COMPLEXES; CLUSTERS; CAGES; GD; SYMMETRY; SHAPE; LANTHANIDES; DESIGN; LN
• Tags: CF NMR, CF SAXS, rivok
• Tags: International impact, Reviewed

Abstract

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.

Links

• LM2015043, research and development project: Name: Česká infrastruktura pro integrativní strukturní biologii (Acronym: CIISB)

Investor: Ministry of Education, Youth and Sports of the CR

• LQ1601, research and development project: Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR