In situ formate anion formation of a single Ln(ΙΙΙ) coordination polymer: syntheses, and the luminescent properties of its doped compounds

Abstract:

A three-dimensional (3D) single Ln(ΙΙΙ) coordination polymers, [La(HCO2)3]n (1), was synthesized in DMF/H2O mixed solvent under solvothermal condition. The formate anions were generated in situ from the N,N-dimethylformamide (DMF) solvent. Compound 1 has been characterized by single-crystal and powder X-ray diffraction, elemental analysis, IR spectra, and thermogravimetric analysis. Compound 1 crystallizes in the rhombohedral, space group R3m. The central La(ΙΙΙ) ion is nine-coordinated by nine formate oxygen atoms from nine formate anions, and the formate anions linking three La(ΙΙΙ) ions form a novel binodal (3, 9)-connected 3D net with Schläfli symbol (4.62)3(46.621.89). Furthermore, 1-La samples doped with Eu, Tb, and Dy show their characteristic luminescence.