Four unexpected lanthanide coordination polymers involving in situ reaction of solvent N, N-Dimethylformamide

•Four unexpected 2D lanthanide coordination compounds have been synthesized through in situ reactions under solvothermal conditions.•The complexes 1–3 contain four types of 21 helical chains in the layer.•Complex 1 exhibits bright red solid-state phosphorescence upon exposure to UV radiation at room temperature.

Four unexpected 2D lanthanide coordination polymers have been synthesized through in situ reactions of DMF solvent under solvothermal conditions. The isostructural complexes 1–3 contain four types of 21 helical chains. While the Nd(III) ions are bridged through μ2-HIDC2− and oxalate to form a 2D sheet along the bc plane without helical character in 4. Therefore, complex 1 exhibits bright red solid-state phosphorescence upon exposure to UV radiation at room temperature.

Graphical abstractFour unexpected 2D lanthanide coordination polymers have been synthesized through in situ reactions of solvent DMF to formate acid or oxalic acid under solvothermal conditions. The isostructural complexes 1–3 contain four types of different 21 helical chains in the 2D layer and 1 exhibits bright red solid-state phosphorescence upon UV radiation.Figure optionsDownload full-size imageDownload as PowerPoint slide