Two new 1D structures of copper(II) or yttrium(III) phosphonatobenzenesulfonates using 1,10-phenanthroline as auxilary ligand

Two new metal phosphonatobenzenesulfonates using 1,10-phenanthroline as auxilary ligand, namely, [Cu(HL)(phen)]·0.5H2O (1) and [Y(L)(phen)(H2O)2]·2H2O (2) (H3L = m-HO3S-C6H4-PO3H2, phen = 1,10-phenanthroline), have been synthesized by hydrothermal reactions. Different to the 0D cluster structures in the “Mn+-H3L-phen-H2O” system (Mn+ = MnII, ZnII, CdII, PbII or LnIII) previously reported, both compounds here feature one-dimensional chain-like structure. The 1D chain structure in 1 features Cu2(PO3)2 dimers fused by the bridging of pairs of bidentate phosphonate groups, which are further interconnected via pairs of monodentate sulfonate groups. In contrast, the 1D chain in 2 features an edge-shared four-membered ring which is composed of two YIII ions and two tridentate phosphonate groups. The different 1D chain structures in them are mainly due to the various coordination modes of the 3-phosphonobenzesulfonic acid ligand.