Two dinuclear lanthanide(III) clusters (Gd2 and Dy2) constructed by bis-(o-vanillin) schiff base ligand exhibiting fascinating magnetic behaviors

Abstract Two new dinuclear lanthanide complexes, namely, [Ln 2 L(dbm) 4 ]·2CH 3 OH (Ln = Gd ( 1 ) and Dy ( 2 ), H 2 L = N,N′-bis(3-methoxysalicylidene)-1,3-diamino-2-propanol, Hdbm = 1,3-diphenyl-1,3-propanedione) have been synthesized and characterized by elemental analyses, single crystal X-ray diffraction and magnetic measurements. The studies of single crystal X-ray diffraction analysis demonstrate that both 1 and 2 are isostructural with a [Ln 2 ] core. Magnetic investigations reveal the presence of a weak antiferromagnetic interaction in 1 and 2 , respectively, of which 1 displays magnetocaloric effect with a large magnetic entropy change (−Δ S m  = 18.95(2) J kg −1  K −1 for Δ H  = 7 T at 2 K), while 2 exhibits slow relaxation of magnetization with the anisotropy energy barrier Δ E / k B  = 0.73(1) K.