Interesting structures of self-assembled gadolinium coordination polymers with tuned stoichiometric ratios

Abstract

Hydrothermal reactions of gadolinium(III) salts with 2,6-naphthalenedisulfonate (nds) and 1,10-phenanthroline with varying mole ratios led to five different compounds, {Gd(phen)(nds)(OH)} n (1), {[Gd 2 (phen) 4 (nds) 3 In the case of 1, nds coordinates as η 2 μ 2 -η 2 μ 2 bridging ligand to adjacent dimers, leading to a three-dimensional network. In 2, nds bridges with each SO 3 À coordinated as a η 3 μ 1 -bridging group, creating a two-dimensional polymer. For 3, 1-D infinite chains with dinuclear units connected by nds results in a 3-D framework based on hydrogen-bond interactions. 0-D 4 and 1-D 5 contain dinuclear clusters, which are further assembled into 3-D supramolecular networks via weak hydrogen bonds and aromatic packing interactions.

Synthesis, structure, and magnetism of a ytterbium coordination polymer with 5-sulfonyl-1,2,4-benzenetricarboxylate and oxalate

“…High coordination number and flexible coordination geometry of lanthanide ions make it difficult to control preparation of lanthanide compounds. Lanthanides have high affinity for hard donors, so ligands containing oxygen are usually employed in lanthanide coordination polymers [10][11][12][13][14][15]. Lanthanideearboxylate fi-ameworks are extensively studied because carboxylate exhibits diverse eoordination and appropriate eonnectivity, utilized for extension of the metal ions into high-dimensional structures [16][17][18][19].…”