A 3-D inorganic–organic hybrid based on saturated Wells–Dawson polyoxoanion and K , linked by an Ag–Ag bond.

A 3-D complex K2[Ag2(biim)2]2P2W18O62 (biim = biimidazole) (1) has been hydrothermally synthesized and characterized by IR, thermogravimetric, and single-crystal X-ray diffraction. Single-crystal X-ray structural analysis reveals that 1 exhibits a 1-D wavelike chain constructed from µ3-bridging oxygen atoms of [P2W18O62]6− and [Ag2(biim)2]2+. The K+ link to six oxygen atoms of three P2W18 clusters and 12 equatorial terminal oxygen atoms of P2W18 clusters link to six K+, resulting in a 3-D framework with a relatively short Ag–Ag bond [2.836 Å]. The electrochemical behavior of 1 modified carbon paste electrode (1-CPE) has been studied. The results indicate that 1-CPE has remarkable stability. [ABSTRACT FROM AUTHOR]