One-pot synthesis of a novel supramolecular compound based on three kinds of Keggin polyoxoanions PMo12O403 − with different coordination modes

A novel supramolecular compound based on three kinds of Keggin polyoxoanions PMo12O403 − with different coordination modes [(phen)4Cu2(PMo12O40)][(phen)2Cu (PMo12O40)]2[PMo12O40][(phen)2Cu(H2O)]2·4H2O (1), has been hydrothermally prepared and characterized by elemental analysis, IR, TG, XRD and single-crystal X-ray diffraction. Compound 1 is composed of one [(phen)4Cu2(PMo12O40)]+ cation, two [(phen)2Cu(PMo12O40)]− anions, one [PMo12O40]3 − anion, two [(phen)2Cu(H2O)]2 + cations and four lattice water molecules, generating an interesting three-dimensional supramolecular framework via supramolecular interactions, in which there are three kinds of Keggin polyoxoanions PMo12O403 − with different coordination modes. To the best of our knowledge, the title compound represents the first example of a structure containing three kinds of Keggin POMs with different coordination modes up to now. Its electrochemical and electrocatalysis behavior have been investigated in detail.