A novel chain structure constructed from copper complexes and dimers based on bi-capped Keggin clusters

The first double-supporting bi-capped Keggin dimeric compound, [Cu(en)2][Cu(en)2(H2O)]2[SiMo8V6O42][Cu(en)2]·1.5H2O (1) (en = ethylenediamine), has been synthesized under hydrothermal. Compound 1 exhibits a unique 1-D structure containing dimerized polyoxoanion linked by transition metal coordination fragment. The adjacent chains are further interconnected into a 3-D supramolecular structure via hydrogen bonds.