New Silver(I) Coordination Polymers with Hetero Donor Ligands: Synthesis, Structure, Luminescence Study and Photo‐Catalytic Behavior

Abstract

Abstract Two new Ag(I) coordination polymers, namely, [Ag 2 (dmt) 2 (tph)] n ( 1 ), [Ag 2 (dmt) 2 (oxalate)] n ( 2 ), and a discrete neutral complex [Ag 2 (dmt) 4 (SO 4 )].2(dmt).2(H 2 O) ( 3 ) (where dmt=2,4‐diamino‐6‐methyl‐1,3,5‐triazine, ox=oxalate anion and H 2 tph=terephthalic acid) were synthesized and characterized using elemental analysis, IR, UV–vis and fluorescence spectroscopy. The solid‐state structures of complexes 1–3 were determined using single crystal X‐ray crystallography. Compounds 1 and 2 are 1D and 3D coordination polymers, respectively, with the packing reinforced by weak interactions such as H‐bonds and π‐π stacking. The most intriguing aspect of the crystal structure of 3 is a pseudo hexagonal arrangement of six dmt, connected by pairs of N−H⋅⋅⋅N hydrogen bonds, around a sulfate anion. The band gap energies of the coordination polymers were determined. All the complexes were found to be photo‐catalytically active and complex 1 displays the higher catalytic activity toward the photo degradation of methylene blue (MB) in water. The higher content of aromatic moieties in 1 plays a significant role in effective charge separation and transport to make it the best catalyst in the series.