Metal-Organic Frameworks (MOFs) as Catalysts

Three lanthanide–transition-metal coordination polymers, namely, [Er2L6(H2O)][Cu2I2] (1), [ErL3][CuI] (2), and [Dy2L6(BPDC)0.5(H2O)4][Cu3I2] (3) (HL=4-pyridin-3-yl-benzoic acid, H2BPDC=4,4′-biphenyldicarboxylic acid) have been made by reacting Ln2O3 CuI with HL at different temperatures under hydrothermal conditions. All the complexes are characterized elemental analysis, IR spectroscopy, thermogravimetric powder X-ray diffraction, single-crystal respectively. 1–3 all construct from dimeric {Ln2} {Cu2} units exhibit two types of structural features: 1 is a two-dimensional layer, 2–3 three-dimensional frameworks. Interestingly, in situ formation BPDC ligand found structure 3. The distinct architectures these indicated that reaction temperature plays an important role higher dimensional polymers.