3D Tb(III) and Eu(III) coordination polymers with mixed dicarboxylate ligands: Synthesis, structure and luminescence properties

Coordination polymers [Ln(bta)(0.5)(ox)(0.5)(H2O)(2)]center dot 2H(2)O (Ln = Tb (1), Eu (2), H(2)ox = oxalic acid; H(4)bta = 1,2,4,5-benzenetetracarboxylic acid) were hydrothermally synthesized, and characterized by elemental analysis, IR, TG, XRD as well as single-crystal X-ray diffraction. Coordination polymers 1-2 display three-dimensional (3D) network structures, which can be simplified into a 3D network with topology symbol of {4(12)center dot 6(3)}, and the topology type is pcu. The luminescence properties of 1 and 2 show characteristic emission of Tb(III) and Eu(III) ions, respectively. The solid-state quantum yield Phi(total) is 19.96 +/- 2.00% and 6.84 +/- 0.68% while the fluorescence decay lifetime is tau = 560.2990 mu s and tau = 233.8299 mu s for 1 and 2, respectively. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

In this study, coordination polymers 1-2 with three-dimensional network structures were synthesized and characterized, showing characteristic luminescence properties of Tb(III) and Eu(III) ions, respectively.