A novel three-dimensional open framework constructed from infinite chains of edge-sharing CeO8(H2O) polyhedron: [Ce2(ad)3(H2O)2]n

A novel cerium–adipate coordination polymer [Ce2(ad)3(H2O)2]n(1) has been hydrothermally synthesized and structurally characterized, which possesses three-dimensional network structure constructed from infinite chains of edge-sharing CeO8(H2O) polyhedron and long carbon chains. Each cerium cation binds to nine oxygen atoms belonging to six adipates and one water molecule, the adjacent cerium atoms are linked together through chelating-bridging and bidentate bridging carboxylates to form infinite polyhedron chains along [1 0 0] direction. The starlike distribution of six μ4-adipates around the central cerium generates a complicated network, which is thermally stable without any collapse even though no any guest molecules reside in the large channels.