Zn-Er heterometallic carboxylate framework based on 3,5-pyrazoledicarboxylic acid with nested sandwich structure and its luminescent property

The crystal structures constructed from 2D Er-Hpdc networks, 0D [Zn(Hpdc)2(H2O)2]2 − unit and hydrogen bonds, which giving rise to a 3D framework that consists of nested sandwich-type structure. This complex displays intense red luminescence and exhibits the characteristic emission of 4I13/2 → 4I15/2 at 1514 nm.206