3D lanthanide coordination polymers constructed from polynuclear clusters and V-shaped organic connectors: Syntheses, structures and properties

• Two isostructural Ln-CPs were prepared by hexanuclear lanthanide complexes.
• They feature a 3D framework containing novel octanuclear [Ln8(OH)8]16+ units.
• They show the characteristic NIR emissions of Yb3+ and Er3+ ions in the solid-state.
• Ln-CP 1 displays the antiferromagnetism in the range of 4–300 K.

Two novel lanthanide coordination polymers (Ln-CPs), [Ln11(OH)8(4,4′-oba)12(CH3COO)2]·(CH3)2NH2·3DMF·nH2O, (Ln = Yb(1), Er(2), 4,4′-H2oba = 4,4′-oxybis(benzoic acid), DMF = N, N′-dimethylformamide, n = 2 for 1, 3 for 2) have been self-assembled from the reaction of hexanuclear lanthanide complexes with flexible V-shaped organic ligands under solvothermal condition. Structural analyses reveal that they are isomorphous and feature a complicated three-dimensional (3D) framework containing novel octanuclear [Ln8(OH)8]16+ units. Moreover, they show the characteristic luminescence emission bands of the corresponding lanthanide ions in the near-infrared regions in the solid-state. Additionally, magnetic property of 1 shows typical antiferromagnetic interactions.

Two novel isomorphous Ln-CPs have been self-assembled from the reaction of hexanuclear lanthanide complexes with flexible V-shaped organic ligand under solvothermal condition. They feature a complicated 3D framework containing novel octanuclear [Ln8(OH)8]16+ units and show the characteristic NIR emissions of the corresponding lanthanide ions in the solid-state.Figure optionsDownload as PowerPoint slide