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A novel supramolecular framework, catena-poly[[[aqua(2-phenylquinoline-4-carboxylato-κ O)silver(I)]-μ-4,4′-bipyridine-κ2 N: N′] dihydrate], {[Ag(C16H10NO2)(C10H8N2)(H2O)]·2H2O} n, has been synthesized and structurally characterized. The AgI centres are four-coordinated and bridged by 4,4′-bipyridine (4,4′-bipy) ligands to form a one-dimensional Ag-bipy chain. The Ag-bipy chains are further linked together by intermolecular O-H...O and O-H...N hydrogen-bonding interactions between adjacent chains, resulting in a three-dimensional framework. [ABSTRACT FROM AUTHOR]