title: Hexameric polyoxometalates decorated by six 3d-4f heterometallic clusters.
abstract: Two nanosized hexameric polyoxometalate-based solid state assemblies (H(2)en)(6)Na(15)K(9)[Dy(6)Fe(6)(H(2)O)(12)(SiW(10)O(38))(6)]·34H(2)O (1) and K(13)Na(17)[H(2)en](3)[Tb(6)Fe(6)(H(2)O)(12)(SiW(10)O(38))(6)]·40H(2)O (2) (en = 1,2-ethylenediamine), decorated by six [Ln-(μ(3)-O)(3)-Fe] 3d-4f heterometallic clusters, have been synthesized by the hydrothermal method, and characterized by IR, element analysis, magnetic studies and the single-crystal X-ray analyses. The detailed study of the synthetic conditions reveals that the use of the organic ligands, pH value and the reaction temperature all play important roles in the synthesis of the 3d-4f heterometallic POMs. Magnetic study suggests the presence of antiferromagnetic interactions in these two compounds.
authors: Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Renmin Street No. 5268, Changchun, Jinlin 130024, PR China.
authors: Zhi-Ming
authors: ZM
authors: Zhang
authors: Yang-Guang
authors: YG
authors: Li
authors: Shuang
authors: S
authors: Yao
authors: En-Bo
authors: EB
authors: Wang