Abstract
Two supramolecular compounds, (2-HANA)4(SiW12O40)·12H2O (1) and (H3O)(2-HANA)2(HPW12O40)·11H2O (2), ANA = 2-aminonicotinic acid, were synthesized in conventional method in aqueous solution and characterized with elemental analysis, IR spectrography, thermal analysis. Their crystal structures were determined with X-ray single-crystal diffraction and CV behavior were examined. In the compounds ANA is protonated and acts as charge complement and hydrogen bond donor and acceptor. In 1 there is a supramolecular chain formed through fourfold hydrogen bonds between water molecules and SiW12 anions, and in 2 a supramolecular layer is formed by hydrogen bonds between protonated O1W molecules and PW12 anions. The protonated water molecule is identified from IR spectrum of 2.
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