An isomer of a POM-based hybrid compound formed through different linkage between CuI ions and pyrazine

作者：Yang, Yang; Li, Chunhe; Chen, Ya-Guang^*

来源：Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2016, 84(3-4): 203-208.

DOI：10.1007/s10847-016-0597-0

• Polyoxometalate
• 3D hybrid compounds
• Double-layer structure
• Copper
• Pyrazine

One 3D Keggin polyoxometalates-based hybrid compound, [Cu-4(pz)(6)(H2O)(2)(SiW12O40)] (1) (pz = pyrazine), was hydrothermally synthesized and characterized by an elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. In compound 1, [Cu-4(pz)(6)(H2O)(2)] (n) (4n+) polymeric cation has 2D network structure including ten-metal rings. The two 2D networks are linked through sharing a coordination water into a double-layer structure. [SiW12O40](4-) anions are embedded between two double-layers through the coordination of O-t atoms to Cu atoms. The pyrazine molecule is in situ formed from the decarboxylation of pyrazine-2,3-dicarboxylic acid. The IR data of 1 also proved the correctness of the structure due to no characteristic peak of carbonyl group in IR spectrum. Thermogravimetric analysis and fluorescence of 1 are also analyzed and discussed.

• 单位
  东北师范大学