Controlled synthesis, structure and luminescent property of a 3D layered–pillared zinc(II) coordination polymer based on a newly designed ligand

Abstract

Continuing our previous strategy for construction of layered–pillared coordination polymer, in this paper, a new O–thiocarbamate–containing ligand H2L (5–[(dimethylamino)thioxomethoxy]–1,3–benzenedicarboxylic acid) has been designed and synthesized to construct a zinc(II)–based metal organic framework, namely [ZnL(4,4′–bpy)]n (1) (4,4′–bpy = 4,4′–bipyridine). Single crystal X–ray diffraction analysis of 1 reveals that the metal ions are bridged by L2– ligands to generate a two–dimensional layer, and the layers are further pillared by 4,4′–bpy to form a three–dimensional framework with a pcu topology. Furthermore, the solid state photoluminescent studies reveal that both H2L and polymer 1 display emission bands at 400 nm upon excitation at 325 nm. The average emission life time is 4.27 µs.