Abstract
AbstractThe lanthanide(III) complexes with 2,3-pyridinedicarboxylate ligand (PDC) were obtained as crystalline compounds from the water solutions. These compounds form the series of Ln
Highlights
Design and synthesis of metal-organic coordination polymers in the field of coordination chemistry and crystal engineering have been of great interest in view of their intriguing variety of architectures and potential applications
These results establish the stoichiometry of lanthanide(III) compounds, which are in agreement with the formulae Ln2(C5H3N (COO)2)3 Â nH2O, where Ln is La, Ce, Pr, Nd, Sm, Eu and Gd(III) and the number of water molecules is from 6 for Eu(III), 9 for Nd and Gd(III) and 8 for remaining complexes
FT-IR spectra of lanthanide 2,3-pyridinedicarboxylates contain wide, intensive bands in the range of 3700−2800 cm–1 which correspond to the stretching O-H vibrations from crystal water molecules
Summary
Design and synthesis of metal-organic coordination polymers in the field of coordination chemistry and crystal engineering have been of great interest in view of their intriguing variety of architectures and potential applications. The synthesis and physico-chemical properties of pyridine derivative ligands are important because a diversity of coordinating structures can be formed, including solid coordination polymers and their numerous applications in material chemistry, catalysis, luminescence and magnetochemistry [7-12 ] Because of their donor sites the 2,3-pyridinedicarboxylic called quinolinic acid [13,14,15,16,17,18] as one of six isomers of pirydinedicarboxylic acid, has found application as the ligand for metal complexes preparation. The ligands, which supplement the coordination sphere of metal ions for example water molecules, DMSO and so on, can be removed from the coordination sphere without the lanthanide-organic framework collapse This inspires the research groups to seek the porous lanthanide-organic frameworks using pyridinedicarboxylate ligands as rigid ones. This investigations presented the synthesis and thermal stability of lanthanide(III) 2,3-pyridinedicarboxylate complexes
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