Two unprecedented entangled coordination polymers based on α-{SiW12O40}4−

Abstract

Two novel entangled POM-based coordination polymers (CPs), namely [Co₂(L)₅(H₂O)₂(SiW₁₂O₄₀)] (1) and [Cu₂(L)₃(H₂O)₂(SiW₁₂O₄₀)]·H₂O (2) (L = 4,4′-bis((1H-1,2,4-triazol-1-yl)methyl)biphenyl), have been hydrothermally synthesized. Compound 1 presents an unprecedented 2D + 2D → 3D polypseudorotaxane motif. The fascinating self-catenated framework of compound 2 contains three types of helical chains. In addition, the photocatalytic properties of compounds 1 and 2 have also been investigated.