A new 2D network constructed by polymeric anions and lanthanides. Synthesis, structure and magnetic property of two new compounds

作者：Yang, Xiao-Dan; Zhang, Chun-Hua; Wang, Da-Peng; Chen, Ya-Guang^*

来源：Inorganic Chemistry Communications, 2010, 13(11): 1350-1353.

DOI：10.1016/j.inoche.2010.07.034

• Magnetic property
• Crystal structure
• Keggin polyoxometalate
• Lanthanide-organic complexes
• Two-dimensional structure

Two new compounds based on [H2W12O40](6-) (W-12) clusters and Ln-organic complexes, [Ln(3)(Hdipic)(dipic) (H2O)(13)(H2W12O40)]center dot 13H(2)O Ln=Sm (1), Gd (2), (dipic = pyridine-2,6-dicarboxylate anion) have been synthesized and characterized by element analysis. IR spectrometry and thermogravimetric analysis. Single-crystal X-ray diffraction analyses reveal that compounds 1 and 2 are isostructural. In 1 and 2 four Ln(3+) ions lie in a plane and form a centrosymmetric regular rhomblike ring {Ln(4)(dipic)(2)(Hdipic)(2)(H2O)(12)}(6+)(Sm-4-ring) through the ligands. The covalent combination of W-12 subunits as a tetradentate ligand to Ln(4)-rings from two sides creates a polymeric anion, {[H2W12O40](2)[Ln(4)(dipic)(2)(Hdipic)(2)(H2O)(12)]}(6-), and then Ln1 ions connect these anions leading to the 2D layers. The magnetic measurements indicate that in 1 and 2 there exist very weak antiferromagnetic interactions.

• 出版日期2010-11
• 单位吉林农业大学; 白城师范学院; 东北师范大学