Three Coordination Polymers Constructed with Zinc(II), 3,3′‐Thiodipropionic Acid, and Bipyridyl Ligands: Syntheses, Crystal Structures and Luminescent Properties

Three zinc(II) coordination polymers {[Zn(tdpa)(bpe)] · 2H 2 O} n ( 1 ), [Zn(tdpa)(bpp)] n ( 2 ), and [Zn(tdpa)(bpypa)] n ( 3 ) were obtained by solvothermal reactions of Zn(NO 3 ) 2 · 6H 2 O with 3,3′‐thiodipropionic acid (H 2 tdpa) and corresponding N‐donor ligands, namely, trans ‐1,2‐bis(4‐pyridyl)ethylene (bpe), 1,3‐bis(4‐pyridyl)propane (bpp), and 4,4′‐bis(4‐pyridyl)diphenylamine (bpypa) respectively. Complexes 1 – 3 were characterized by elemental analysis, IR spectroscopy, as well as powder and single‐crystal X‐ray diffraction. Compound 1 can be considered as a 3D supramolecular architecture based on 2D undulated (4,4) layers, which are connected through hydrogen bonding interactions. 2 possesses a twofold interpenetrating 2D network, whereas 3 exhibits a 3D supramolecular structure based on 2D (6 5 8) layers through hydrogen‐bonding interactions and π ··· π stacking interactions. The photoluminescent properties of 1 – 3 were also investigated.