Synthesis, crystal structure and characterisation of the complex {Ln(DHTA)(1.5)(H2O)(3)]center dot H2O}(n) (Ln = La, Ce, Nd)

By introducing different metal ions, we present three new coordination polymers {[Ln(DHTA)(1.5)-(H2O)(3)]center dot H2O}(n) (Ln = La 1, Ce 2, Nd 3, H(2)DHTA = 2,5-dihydroxyterephthalic acid) by using a hydrothermal technique. Structural analysis revealed that 1-3 are isostructural, displaying a one-dimensional structure along the a axis and a two-dimensional network along the b axis, which was stabilised by O-H...O intermolecular hydrogen bonding and pi-pi stacking interactions. The photoluminescent data of the three complexes have been studied in detail. Moreover, C and H elemental analysis, infrared (IR) spectroscopy in the range of 4000-400 cm(-1), powder X-ray diffraction and thermogravimetric analysis (TG) of the three complexes have also been described.