Organic–inorganic hybrid materials: Ligand influences on the structural chemistry of copper-vanadates

Hydrothermal reactions were used in the preparation of a series of bimetallic organic–inorganic hybrid materials of the M(II)/VxOy/organonitrogen ligand class. Compound 1, [{Cu2(bpa)2(C2O4)}2V4O12]·H2O, is molecular, while [{Cu(terpy)}2V6O17] (2), [Cu2(bpyrm)V4O12] (4) and [{Cu(phen)(H2O)2}VOF4(H2O)]·2H2O (5) are two-dimensional, three-dimensional and one-dimensional, respectively (bpa = 2,2′-bipyridylamine; terpy = 2,2′:6,2″-terpyridine; bpyrm = 2,2′-bipyrimidine; phen = 1,10-phenanthroline). In contrast to the 2-D structure of 2, the Ni(II) analogue [{Ni(terpy)}2V4O12]·2H2O (3) is one-dimensional. The {V4O12}4− cluster is a building block of structures 1, 3, and 4 while 2 is constructed from {V6O17}4− rings.