Two Ag(I)/Cd(II) Coordination Polymers of 2-Fluoroisonicotinic Acid: Syntheses, Structures and Luminescent Properties

Abstract

Two new coordination polymers, namely [Ag(L)]n (1) and [Cd(L)2(bpe)]n (2) [HL = 2-fluoroisonicotinic acid, bpe = 1,2-bi(4-pyridyl)ethylene], have been synthesized by solvent evaporation and layered-diffusion technique, respectively. The structural analysis revealed that compound 1 is a linear chain structure, whereas compound 2 shows a 1D ladder-like structure with dinuclear [Cd(COO)2] stretched by bpe linkers in parallel arrangement. The thermal stability and photoluminescent properties of both 1 and 2 in the solid state were also investigated, which demonstrated the perfect thermal stability and a certain degree of redshift fluorescent characteristic. Two Ag(I)/Cd(II) CPs were synthesized by solvent evaporation and layered-diffusion technique. Both CPs were characterized by elemental analysis, FT-IR, single-crystal XRD, PXRD and TGA techniques. The solid state photoluminescent study indicates those have strong fluorescent emissions.