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

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(mu(3)-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 angstrom. The magnetic properties of the complex were studied by magnetic susceptibility chi(M)(T) and magnetization M(H) measurements. The results show on the weak antiferromagnetic coupling at low temperatures represented by the Weiss constant theta = -0.468 K. The value of effective magnetic moment mu(eff) = 7.57 mu(B), 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.