1-D to 3-D lanthanide coordination polymers constructed from 5-aminoisophthalic acid and oxalic acid

Three lanthanide metal organic frameworks (MOFs) with mixed carboxylates of 5-aminoisophthalic acid (H(2)AIP) and oxalic acid (H2OX), namely [Yb(AIP)(OX)(0.5)(H2O)(3)](n)center dot H2O (1), [Tb(HAIP)(OX)(H2O)](n) (2), and {[Er(AIP)(OX)(0.5)(H2O)]center dot H2O}(n) (3) were obtained by hydrothermal reactions and characterized by elemental analysis, IR spectra and thermogravimetric analysis, as well as single crystal X-ray diffraction. These frameworks exhibit three typical structural features: complex 1 possesses one-dimensional ladder-like chain, 2 has two-dimensional layer, and 3 is three-dimensional framework. Moreover, the fluorescent property of 2 is also investigated. (C) 2012 Published by Elsevier B.V.