Structure and Magnetic Properties of Three-Dimensional Gadolinium-Based Hybrid Framework

M. Almášia, A. Zeleňákováb, I. Císařovác, J. Bednarčíkd, V. Zeleňáka,* aDepartment of Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia bDepertment of Physics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia cDepartment of Chemistry, Charles University, Hlavova 2030, 128 43 Prague, Czech Republic dDESY/Hasylab, Notkestraße 85, 226 07 Hamburg, Germany

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In the present work we have focused on the preparation and magnetic study of coordination polymer formed by Gd(III) cations as nodes and formate (HCOO¯; FOR) anions as charge compensating linkers. The prepared complex with formula {[Gd(μ3-FOR)3]}n was characterized by single-crystal X-ray diffraction, and high-energy powder X-ray diffraction. The structural study showed that complex is formed by 3D polymeric network with the shortest Gd-Gd, distances of 3.998 Å. The magnetic properties of the complex were studied by magnetic susceptibility χM(T) and magnetization M (H) measurements. The results show on the weak antiferromagnetic coupling at low temperatures represented by the Weiss constant θ=-0.468 K. The value of effective magnetic moment μeff=7.57μB, which was estimated from the experimental data is close to the theoretical value for systems with S=7/2. Correlation between crystal structure of complexes and magnetic properties is presented.

DOI: 10.12693/APhysPolA.126.308 PACS numbers: 75.75.Fk, 81.05.Rm, 75.40.Cx