Supramolecular Self-Assembly of V-Shaped Water Trimers and Diethylenetriamine Molecules in a New Solid State Ferrous Molybdenum(V) Phosphate

A new ferrous molybdenum(V) phosphate, [H(2)deta](4)[H3O]{Na[(FeMo)-Mo-II (12) (V) O-24(OH)(6)(HPO4)(6)(PO4)(2)]}center dot 6H(2)O 1 (deta = diethylenetriamine) has been prepared under hydrothermal condition and thoroughly characterized by IR, UV-Vis spectroscopy, elemental analyses, single-crystal X-ray diffraction, powder XRD and TG-DTA. The structural analysis reveals that isolated V-shaped water trimers and protonated diethylenetriamine molecules coexist in the crystal lattice of 1 and form an unprecedented 1-D strip-like arrangement via hydrogen bonding interactions. The strip-like arrangement further interacts through intermolecular non-covalent interactions with its surroundings, viz., the new 1-D inorganic anionic chain constructed by the versatile Fe[Mo6P4O31] building blocks which is covalently connected with NaO6 octahedra, and finally results in a supramolecular entity that is favourable in terms of packing efficiency and system energy minimization. The electrochemical properties of the compound 1 is also investigated by voltammetric method.