Synthesis, structures and luminescent property of two lanthanon complexes assembled from 2,3-pyrazinedicarboxylic acid and ammonia

Two lanthanon complexes, (NH4)2[RE2(pzdc)4(H2O)2] (RE = Y(1), Sm(2)), were synthesized by hydrothermal reactions of 2,3-pyrazinedicarboxylic acid and the RE(NO3)3·6H2O(RE = Y, Sm), with the ammonia adjusted the pH value. They are characterized by elemental analysis, FT-IR and TGA. Single-crystal X-ray diffraction shows that they are isostructural and exhibit 3D network structure based on the [RE2(pzdc)4(H2O)2] building blocks. The NH4+ cations are located in the channels and balance the charge of anion framework. Furthermore, the luminescent property of complex 2 has also been studied.