Abstract
Four transition–lanthanide metal–organic coordination polymers, namely [Ag 2Ln(nic) 4(H 2O) 4 · (ClO 4) · H 2O] [Ln = Eu ( 1), Gd ( 2)] and [AgLn(nic) 2(ox) 0.5(H 2O) 2 · (ClO 4) · H 2O] [Ln = Tb ( 3), Yb ( 4)] (nic = nicotinate; ox = oxalate) have been synthesized by the hydrothermal reactions of 4d and 4f metal salts with N-/O-donor ligands. The isostructural complexes 1 and 2 exhibit novel 2D wave-like heterometallic layers constructed by the assembly of 1D chains of lanthanide–carboxylate with Ag(nic) 2 subunits. Complexes 3 and 4 show another unusual 3D heterometallic coordination framework constructed from 2D lanthanide–oxalate layers and pillar-like Ag(nic) 2 subunits. Furthermore, the luminescent properties of complexes 1 and 3 were studied.
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