Syntheses, crystal structures and photoluminescent properties of silver(i) and cadmium(ii) coordination polymers constructed from flexible hexadentate di-Schiff base ligands

Abstract

A novel flexible S2N4 di-Schiff base, 2,2′-((1,4-phenylenebis(methylene))bis(sulfanediyl))bis(N-(pyridin-2-ylmethylene)aniline (pbbpa), was synthesized and used to construct two Ag(I) and Cd(II) coordination polymers, namely [Ag4(pbbpa)(NO3)4]n (1) and [Cd2(pbbpa)(NO3)4]n (2), which exhibited complicated 3D frameworks, incorporating Ag–C bonds and a 2D 63-hcb net, respectively. Their thermal stabilities, UV-vis absorption and photoluminescent properties were also discussed.