3-D Lanthanide Metal-Organic Frameworks: Structure, Photoluminescence, and Magnetism

A series of isostructural three-dimensional metal-organic frameworks [Pr-2(N-BDC)(3)(dmf)(4)](infinity) (1), {[Eu-2(N-BDC)(3)- (dmf)(4)]center dot 2DMF}(infinity) (2 center dot 2DMF), [Gd-2(N-BDC)(3)(dmf)(4)](infinity) (3), {[Tb-2(N-BDC)(3)(dmf)(4)]center dot 2DMF}(infinity) (4 center dot 2DMF), {[DY2(N-BDC)(3)(dmf)(4)]center dot 2DMF}(infinity) (5 center dot 2DMF) (N-H2BDC = 2-amino-1,4-benzenedicarboxylic acid; DMF = N,N '-dimethylformamide) with cubic 4(12)center dot 6(3) topology have been synthesized using solvothermal conditions. The networks were generated via formation of a dinuclear Ln(2) secondary building block, involving the dicarboxylate ligand as a bridge. The luminescent properties of the Tb-III and Eu-III complexes were studied and showed characteristic emissions at room temperature, Antiferromagnetic interactions between Ln(III) ions were observed from magnetic susceptibility data.