A novel polyoxometalate templated microporous metal–organic framework with electrochemical properties

Abstract

A novel Wells–Dawson polyoxometalate-templated 3D microporous metal–organic framework (MOF), namely, H₆[Cu₃(H₂O)₆(P₂W₁₈O₆₂)₂(3-dpye)₆]·28H₂O (1) (3-dpye = N,N′-bis(3-pyridinecarboxamide)-1,2-ethane), was hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric analyses (TGA). Each Cu(II) ion acts as a four-connected node linking four 3-dpye ligands to construct a 3D microporous host MOF containing left-handed helical chains, in which the P₂W₁₈O₆₂⁶⁻ anions reside. 1 represents the first example of 3D MOFs with an 8⁶ uniform net containing non-coordinating Wells–Dawson anions. The electrochemical properties have been investigated in detail.