Synthesis, Characterization, and Photoluminescence Properties of Silver(I) Metal-Organic Polymers with Nanochannels Based on 2-Sulfoterephthalic Acid and Di(pyridin-2-yl)amine Ligands

Two new silver(I) 3D coordination polymers, namely [Ag3(2-stp)(dpa)]n (1) and {[Ag2(2-stp)(H2O)]⋅Hdpa}n (2) (2-NaH2stp=sodium 2,5-dicarboxysulfonate, dpa=di(pyridine-2-yl)amine) were synthesized. The complexes were characterized by elemental analysis, FT-IR spectra, thermogravimetric analyses (TGA), and single-crystal X-ray diffraction. In complex 1, three neighboring Ag ions are bridged by N- and O-atom, forming a 3D coordination network. The molecular structure of 2 is cationanion species, forming 3D hostguest supramolecular network with the [Hdpa]+ cations encapsulated in the nanochannels. The photoluminescence properties of the complexes were also investigated in the solid state at room temperature.