Three New Keggin‐based Compounds Constructed by a Hydralazine Derivative Ligand: Assembly, Structures, and Properties

Three new inorganic-organic hybrid compounds based on α-Keggin clusters and Ag-organic subunits, [Ag3L4(H2O)4][PMo12O40]·3H2O (1), [Ag3L4(H2O)4][PW12O40]·2H2O (2), and [Ag3L6][PMo12O40] (3) [L = 1-amino-4-(3,5-dimethylpyrazolyl)hydralazine], were synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction. Compounds 1 and 2 are isostructural and contain two kinds of Ag subunits: dinuclear [Ag2L2(H2O)4]2+ and mononuclear [AgL2]+. The dinuclear Ag clusters are linked by Keggin anions to construct a 1D chain, whereas the mononuclear Ag subunits form another supramolecular chain. The adjacent 1D coordination chains and supramolecular chains connect with each other through hydrogen bonding interactions to form a 2D supramolecular layer. In compound 3, the discrete mononuclear subunits [AgL2]+ are linked by PMo12O403– anions through hydrogen bonding interactions to construct a supramolecular chain. Additionally, the electrochemical and photocatalytic properties of the title compounds were investigated.

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