First examples of ternary lanthanide succinate complexes: hydro-solvothermal syntheses and structures of lanthanide coordination polymers of succinic acid and 1,10-phenanthroline

Three new supramolecular lanthanide coordination polymers, {[Eu(SA)1.5(phen)]·H2O}n (1), and [Ln(SA)1.5(phen)]n [Ln=Er (2); Yb (3)] were obtained by hydro-solvothermal reactions of lanthanide chlorides with succinic acid (H2SA) and 1,10-phenanthroline (phen), and characterized by single crystal X-ray diffraction, elemental analysis and IR spectrum. Complexes 1–3 also have 2D networks which are further architectured to form 3D supramolecular structures by hydrogen bonds and π–π aromatic interactions, of which 1 has 1D channels. The H2SA ligands are all completely deprotonated and exhibit tetra- and pentadentate coordination modes in the titled complexes. The photoluminescence property of 1 was investigated.