title: Poly[tetra-aqua-(5-hy-droxy-pyridin-1-ium-3-carboxyl-ato-κO (3))tris-(μ-oxalato-κ(4) O (1),O (2):O (1'),O (2'))dieuropium(III)].
abstract: In the title compound, [Eu2(C6H5NO3)2(C2O4)3(H2O)4] n , the Eu(III) atom is bonded to one O atom from a monodentate 5-hy-droxy-pyridin-1-ium-3-carboxyl-ate ligand, six O atoms from three oxalate ligands and two water mol-ecules, exhibiting a highly distorted tricapped trigonal geometry. Three independent oxalate ligands, each lying on an inversion center, bridge the Eu(III) atoms, forming a brickwall-like layer parallel to (001), which is stabilized by intra-layer O-H⋯O hydrogen bonds. The layers are further linked through inter-layer O-H⋯O and N-H⋯O hydrogen bonds and π-π inter-actions between the pyridine rings [centroid-centroid distance = 3.5741 (14) Å] into a three-dimensional supra-molecular network.
authors.affiliation: Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, People's Republic of China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Xu
authors.forename: Jun-Long
authors.initials: JL
authors.lastname: Mi
authors.forename: Hong-Ji
authors.initials: HJ
authors.lastname: Chen