Arenedisulfonate–lanthanide supramolecular architectures with phenanthroline as a co-ligand: syntheses and structures

Abstract

The reaction of Ln^III salts with 1,5-naphthalenedisulfonate (1,5-NDS) or 2,7-naphthalenedisulfonate (2,7-NDS), and phenanthroline (phen) under hydrothermal conditions gave a series of new 2-D complexes {[Ln(1,5-NDS)_1.5(phen)₂(H₂O)₂]·3H₂O}_n [Ln = Eu^III (1), Gd^III (2), Nd^III (3), Tb^III (4)] and dinuclear compounds [Ln₂(2,7-NDS)₂(μ₂-OH)₂(phen)₄(H₂O)₂]·4H₂O [Ln = Eu^III (5), Gd^III (6), Tb^III (7)], respectively. 1–4 are puckered (6,3) networks with 1,5-NDS as a bridge and phen chelating to Ln^III ions. 5–7 are hydroxyl bridged dinuclear entities, which extend to 2-D networks by H-bonds.