title: Lanthanide(III) oxalatophosphonates: syntheses, crystal structures and luminescence properties.
abstract: By the introduction of oxalate as the second ligand, five new lanthanide oxalatophosphonate hybrids with a 2D layered structure, namely, [Ln(H2L)(C2O4)(H2O)]·2H2O [Ln = Nd (1), Sm (2), Eu (3), Tb (4), Dy (5), H3L = H2O3PCH2NCH2(CH2CH2OPO2H)], have been hydrothermally synthesized and structurally characterized by X-ray single-crystal diffraction, X-ray powder diffraction, infrared spectroscopy, elemental analysis and thermogravimetric analysis. Compounds 1-5 are isostructural and exhibit a 2D layer formed by the interconnection of a 1D zigzag chain of {Ln(C2O4)}(+) with the phosphonate ligands. The effect of lanthanide contraction induces the decrease of the lattice parameters and crystal size from Nd to Dy. The luminescence properties of compounds 2-5 have been studied.
authors.affiliation: School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P. R. China. szg188@163.com.
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Jiao
authors.forename: Ji-Cai
authors.initials: JC
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zhen-Gang
authors.initials: ZG
authors.lastname: Sun
authors.forename: Yan-Yu
authors.initials: YY
authors.lastname: Zhu
authors.forename: Lu-Lu
authors.initials: LL
authors.lastname: Dai
authors.forename: Shao-Ping
authors.initials: SP
authors.lastname: Shi
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou