A novel 3D polyoxometalate-linked polypseudo-rotaxane framework by using semi-rigid bis(triazole) ligand

A novel 3D polyoxometalate-linked polypseudo-rotaxane framework, [Cu(L)(2)((HPW10W2O40)-W-VI-O-V)][Cu(L)(H2O)(4)]center dot 4H(2)O (1) (L=4,4'-bis(1,2,4-triazol-1-ylmethyl)biphenyl), was synthesized under hydrothermal conditions. Compound 1 contains a 2D grid-like sheet, which is constructed from bi-nuclear [Cu2L2](4+) cycles and Keggin anion linkages. The 1D polymeric [CuL(H2O)(4)](2+) chains penetrate the 2D sheets at an inclined angle to generate an interesting 3D polypseudo-rotaxane architecture. (c) 2011 Elsevier B.V. All rights reserved.