Synthesis, crystal structures and photoluminescence properties of two silver(I) coordination polymers with nano size channels based on 2-sulfoterephthalic acid ligand

Self-assembly of silver nitrate with 2-sulfoisophthalic acid monosodium salt (NaH2stp) produced two novel Ag(I) coordination polymers, [Ag3(2-stp)(H2O)]n (1) and [Ag2(2-Hstp)]n (2), respectively. Single-crystal X-ray diffraction reveals that compound 1 has a 3D supramolecular structure containing Ag…Ag and Ag…O weak interactions. Compound 2 also features a 3D supramolecular network formed by Hstp2− ligands and π…π stacking interactions. In the solid state and at room temperature, compound 1 exhibits blue photoluminescence with a maximum at 453 nm upon excitation at 383 nm. Compound 2 shows green photoluminescence with a maximum at 524 nm upon excitation at 330 nm.