A new two-fold interpenetrated three-dimensional compound based on metal–organic coordination polymers and {V4O12} clusters: [Cu(bipy)]4V4O12$2H2O (bipyZ4,40-bipyridine)

A new composite material [Cu(bipy)]4V4O12$2H2O(bipyZ4,40-bipyridine) (1) has been synthesized using hydrothermal technology. 1 is a two-fold interpenetrating three-dimensional structure composed of {V4O12}4K rings covalently attached by four {Cu(bipy)}C moieties through the terminal oxo groups of vanadium sites. Compound 1 is the first example of interpenetrating (3,4)-connected network constructed from metal–organic polymers and polyoxometalates. Interestingly, Cu(I) atoms have a T configuration and {V4O12}4K rings link to [{Cu(bipy)}C]n chains via two different connecting behaviors. q 2005 Elsevier B.V. All rights reserved.