Three rare Ln–Na heterometallic 3D polymers based on sulfate anion: Syntheses, structures, and luminescence properties

•Three rare Ln–Na heterometallic 3D polymers based on sulfate anion were prepared.•Three compounds display excellent thermal stability.•The strong characteristic terbium and dysprosium luminescence were observed.

Three Ln–Na heterometallic 3D polymers based on sulfate anion, [LnNa(SO4)2(H2O)] (Ln = Gd (1); Tb (2); Dy (3)), were synthesized under hydrothermal conditions, which are the first examples of Ln–Na sulfates. These compounds crystallize in the trigonal P3121 space group, and display a 6-connected sma topological structure with a Schäfli symbol of (410·65). The characteristic analyses reveal that compounds 1–3 display excellent thermal stability, and all exhibit antiferromagnetic interactions between the metal centers. The luminescent properties of 2 and 3 show the characteristic terbium and dysprosium luminescence. The strong luminescence in the green light (5D4 → 7F5) region for 2 and blue light (4F9/2 → 6H15/2) region for 3 indicate that they may be excellent candidates for green or blue fluorescent materials.

Graphical abstractThree 3D [LnNa(SO4)2(H2O)] (Ln = Gd (1); Tb (2); Dy (3)) polymers were reported as the first example of Ln–Na heterometallic sulfates. These compounds display excellent thermal stability. The strong luminescence in the green light (5D4 → 7F5) region for 2 and blue light (4F9/2 → 6H15/2) region for 3 indicates that they may be outstanding candidates for green or blue fluorescent materials.Figure optionsDownload full-size imageDownload as PowerPoint slide