Hydrothermal Syntheses and Crystal Structures of Three Lanthanide(III) Complexes Based on Carboxyl Derivatives of 1,10-Phenanthroline

Three lanthanide(III) complexes [Ln(4-NCP)(1,4-BDC)]n center dot xnH(2)O (Ln = Pr (1), Sm(2), Nd (3). 4-HNCP = 2-(4-carboxyphenyl)imidazo(4,5-f)(1,10) phenanthroline, 1,4-H2BDC = benzene-1,4-dicarboxylic acid) have been hydrothermally synthesized and characterized via elemental analysis, infrared spectrometry and single-crystal X-ray diffraction. Structural analyses revealed that complexes 1 similar to 3 possess similar porous three-dimensional frameworks with the point symbol {4(12).(63)}. Meanwhile, complexes 1 similar to 3 exhibit excellent thermal stabilities and complex 2 exhibits characteristic luminescent property.