Coordination polymers of rare-earth elements with 2-aminoterephthalic acid

Coordination polymers of REEs with 2-aminoterephthalic acid [Ln2(C8H5NO4)3(H2O)5] n · 2nH2O (Ln = Eu, Gd, or Tb) and [Y2(C8H5NO4)3(H2O)4] n · 4nH2O were prepared by hydrothermal synthesis. Studies of the thermal behavior of these coordination polymers have shown that the removal of the solvate and the coordinated water molecules occurs at heating to 250°C and dehydratation products are stable up to 400°C. Detailed studies of the magnetic behavior of Eu, Gd, and Tb polymers were performed.