Synthesis, crystal structures and properties of Ln(iii)–Cu(i)–Na(i) and Ln(iii)–Ag(i) heterometallic coordination polymers

Abstract

Nine 3D heterometallic coordination polymers, namely [NaLn₂Cu₆I₅(IN)₆(ox)(H₂O)₄]·H₂O [Ln = La (1), Eu (2), Gd (3), Tb (4), HIN = isonicotinic acid, ox = oxalate], [Ln₂Ag₄(IN)₅(ox)₂(NO₃)(H₂O)₂]·3H₂O [Ln = Dy (5), (6) Ho], [LnAg(IN)₂(ox)]·H₂O [Ln = La (7), Pr (8), Tm (9)] have been successfully synthesized under hydrothermal conditions. Compounds 1–4 exhibit same unusual 3D pillared-layer heterometallic coordination frameworks that are built up by the Ln-ox-Na layers, 2D inorganic [(Cu₆I₅)⁺]_n layers and IN ligands. Compounds 5 and 6 represent 3D coordination frameworks that are constructed from rare Ln(III)-ox-IN chains and Ag(I)-IN-ox layers. 3D coordination networks of compounds 7–9 are built up from 2D Ln(III)-IN-ox layers and Ag(I)-IN-ox subunits. Furthermore, the magnetic properties of compounds 5 and 6 and the luminescence properties of compounds 2, 4 and 5 have been investigated.