A zinc coordination compound showing green photoluminescence

Abstract

Abstract A novel three-dimensional coordination compound has been solvothermally synthesized based on a tetracarboxylate ligand H 4 L (H 4 L = 1,3,6,8-tetrakis(4-carboxylphenyl)pyrene), Zn 2 L(H 2 O) 2 ·2DEF ( 1 ) (DEF = N , N ′-diethylformamide). Each Zn ion is coordinated by four carboxylate oxygen atoms from four L 4− ligands and one oxygen atom from a water molecule to provide a distorted square-pyramidal geometry. Pairs of adjacent Zn cations are bridged by four carboxylate groups of four different L 4− ligands to generate a paddle-wheel [Zn 2 (COO) 4 (H 2 O) 2 ] secondary building unit (SBU). Each SUB is further linked to four L 4− ligands to give a three-dimensional framework with cds-type (CdSO 4 -type) topology. The crystal structure has been determined via single-crystal X-ray diffraction, and the compound was characterized by elemental and thermal analysis, infrared spectroscopy, powder X-ray diffraction, and solid-state photoluminescence measurements.