A Ag-La coordination polymer with metatungstate and 2-pyrazinecarboxylic acid. Synthesis, structure and luminescence

作者：Lv, Y; Chen, YG^*; Li, XM

来源：Inorganic Chemistry Communications, 2014, 45: 33-35.

DOI：10.1016/j.inoche.2014.03.044

• La - Ag coordination polymer
• Metatungstate
• Photoluminescence
• Crystal structure

A Ag-La coordination polymer of metatungstate (H2W12O406-) and 2-pyrazinecarboxylic acid (L), (H3O)[Ag-6 La(H2O)(6)L-4(H2W12O40)](1), was synthesized hydrothermally and characterized by elemental analysis, IR spectroscopy, and thermal gravimetric analysis. Single-crystal X-ray analysis reveals that the compound 1 crystallizes in monoclinic system with C2/c space group. In 1 Ag ions are coordinated by H2W12O406- and 2-pyrazinecarboxylic acid. The linkage of Ag and L creates a AgL polymeric chain extending along b-axis. H2W12O406- acts as a thirteen-dentate ligand and coordinates to sixteen Ag+ ions of six AgL chains, leading to a three dimensional structure. La3+ ion accepts six carboxyl oxygen atoms of four AgL chains and two water molecules, exhibiting a nearly cube geometry. Photoluminescent emission peak of 1 is observed at 438 nm which is attributed to LMCT or MLCT transition.

• 出版日期2014-7
• 单位伊犁师范大学; 东北师范大学