Syntheses, structures and photoluminescent properties of two metal-organic complexes assembled with a new polycarboxylate ligand

Two new coordination compounds, [Zn2(HL)(L)(H2O)3]n (1), {[Cd3(L)2(H2O)4]∙H2O}n (2) (H3L = 2,4,6-tri (3-carboxyphenylthio) -1,3,5-triazine), were synthesized hydrothermally and characterized by single-crystal X-ray diffraction. 1 is a 1D wave-like infinite chain which is further connected by hydrogen-bond and noncovalent S…S interactions to form a 3D supramolecular architecture. 2 features 2D layered structure and further forms a 3D supramolecular network based on hydrogen-bond interactions. In addition, both 1 and 2 show strong blue photoluminescence at room temperature resulting from ILCT.

Two new coordination polymers have been synthesized under hydrothermal conditions. Intermolecular weak interactions play crucial role in the construction of the two complexes. The structure of complex 1 varies from an infinite 1D chain through 2D nanoporous layer to a 3D network by hydrogen-bond and noncovalent S…S interactions. 2 exhibits a 2D layered framework which is further linked via intersheet hydrogen-bond interactions to form a 3D supramolecular network.Figure optionsDownload as PowerPoint slideResearch Highlights
► Two new complexes were successfully synthesized by using Zn(II) and Cd(II) ions to react with the ligand H3L under hydrothermal conditions.
► Intermolecular weak interactions such as hydrogen-bond and noncovalent S…S interactions played an important role in constructing 3D supramolecular architecture.
► The two complexes both exhibit strong blue emissions at room temperature, which suggested potential applications in photoluminescent materials.