Poly[[aqua(μ2-4,4′-bipyridine)(μ5-4,4′-oxydibenzene-1,2-carboxylato)di-zinc(II)] 4,4′-bipyridine hemisolvate]

A new three-dimensional metal-organic framework, {[Zn-2(C16H6O9)(C10H8N2)(H2O)].0.5C(10)H(8)N(2)}(n), is a porous three-dimensional bipyridyl-pillared framework with rhombic channels built from two-dimensional helical double layers of Zn-DETA [DETA is 4,4'-oxydi(benzene-1,2-carboxylate)] with the 4,4'-bipyridyl guest molecules locked in the cavities through short O-H center dot center dot center dot N hydrogen bonds.