Organic-inorganic hybrids constructed by Anderson-type polyoxoanions and copper coordination complexes

摘要

Four organic-inorganic hybrid compounds based on Anderson-type polyoxoanions, namely, {[Cu(2,2'-bpy)(H2O)(3)](2)[Cr(OH)(6)Mo6O18]} {[Cu(2,2'-bpy)(H2O)Cl] [Cu(2,2'-bpy)(H2O)(NO3)] [Cr(OH)(6)Mo6O18]} center dot 18H(2)O (1), [Cu(2,2'-bpy)(H2O)(2)Cl]{[Cu(2,2'-bpy)(H2O)(2)][Cr(OH)(6)Mo6O18]} center dot 4H(2)O (2), (H3O){[Cu(2,2'-bpy)(H2O)(2)](2) [Cu(2,2'-bpy)(H2O)](2)}[Cr(OH)(6)Mo6O18](3)center dot 36H(2)O (3), and (H3O){[Cu(2,2'-bpy)(H2O)(2)](2)[Cu(2,2'-bpy)(H2O)](2)} {Al(OH)(6)Mo6O18]3 center dot 33H(2)O (4), were isolated by conventional solution method, and crystal structures have been determined by single-crystal X-ray diffraction. Among them, compound I displays a discrete supramolecular Structure, compound 2 shows a chainlike Structure with chloro-copper complexes as counteranions, and compounds 3 and 4 are isomorphic and exhibit unique 3D open frameworks with lattice water molecules residing in the channels. The compounds 3 and 4 represent the first example of 3D organic-inorganic hybrid compounds in the TMs/2,2'-bpy/POMs system. Investigation of the reaction conditions reveals that the geometry and size of the anions together with its coordinating abilities to the metal centers have a decisive influence on both the composition and the dimensionality of the final Compounds. (C) 2008 Elsevier Inc. All rights reserved.