Abstract
Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) and [Ce2.6(PTA)4(Oxa)2(H2O)10]·(MeOH)7H2O (2) (PTA = 2,4,6-pyridinetricarboxylate, oxa = oxalate and Gly = glycine), were synthesized. The oxalate in 1 and 2, generated in situ from the cleavage and chemical rearrangement of PTAH3, assembled into mixed-ligand networks to generate 3-D frameworks. Single crystal analysis reveals that in both complexes, Ce(III) shows coordination numbers of 7 and 10 in 1 and 8 and 10 in 2. PTA adopts four kinds of coordination modes. These complexes were further characterized using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.
Acknowledgment
We gratefully acknowledge the Higher Education Commission, Islamabad, Pakistan for its financial support under its Indigenous PhD Program batch (VI).