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.

Three 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 as PowerPoint slide