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Four inorganic–organic hybrid materials based on poly(oxomolybdophosphate) cluster building blocks have been obtained by hydrothermal methods. 1shows a 2-D sheet structure, 2and 3possess 1-D chain structures and 4is the discrete cluster. Crystal structural analysis reveals that the dimensionality and organization of those compounds can be tuned by the pH value of the reaction system. In addition, the fluorescence emissions are analysed of compounds 1, 2and 4containing Cd atoms with d10electronic configuration red-shift along with the increase in the dimensions of those compounds. [ABSTRACT FROM AUTHOR]

Three new supramolecular architectures based on polyoxovanadates H6V10O28·2HMTA·8H2O(1), [Ni(enMe)3]2(VIV8VV7O36Cl)·2H3O (2) and [Co(en)3]2(VIV8VV7O36Cl)·2H3O (3) (HMTA = hexamethylenetetramine, enMe = 1,2′-propanediamine and en = ethylenediamine) have been prepared and characterized by elemental analyses, IR spectra, XPS spectra and single crystal X-ray diffraction structure analyses. Compound 1displays a 3-D (4,8)-connected supramolecular host network, which is constructed of octamer water clusters and HMTA molecules, with 1-D channels occupied by the template [H6V10O28] units. Compound 2possesses a 2-D (3,6)-connected supramolecular layered structure formed by water molecules and [V15O36]3−units showing honeycomb cavities occupied by the transition metal complexes (TMCs). Compound 3exhibits a 3-D (4,6)-connected supramolecular host network built by the [V15O36]3−units and the lattice water molecules with TMCs cations as the template. By a careful inspection of the structures of 1–3, it is believed that the steric hindrances of organonitrogen ligands are important for the formation of different supramolecular networks. Compound 1exhibits intensive photoluminescence and compound 3displays antiferromagnetic interactions. [ABSTRACT FROM AUTHOR]