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.

Graphical abstractA novel supramolecular compound based on three kinds of PMo12O403 − with different coordination modes [(phen)4Cu2(PMo12O40)][(phen)2Cu (PMo12O40)]2[PMo12O40][(phen)2Cu(H2O)]2·4H2O (1), is reported for the first time. It proves the feasibility of the coexistence of three kinds of PMo12O403 − in one compound. Furthermore, 1-CPE displays good redox properties and electrocatalytic activity to reduce H2O2.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A new supramolecular compound based on three kinds of PMo12O403 − is first reported. ► 1-CPE displays unique redox property and good electrocatalytic activity. ► It provides useful prototype for design and synthesis of new compound.