Two 1D Coordination Polymers with Bis[4‐(pyridin‐4‐yl)pyrimidinyl]disulfide (4‐ppds) as Bridging Ligand

Abstract

AbstractSolution assembly of heterocyclic disulfide ligand, 4‐ppds {4‐ppds = bis[4‐(pyridin‐4‐yl)pyrimidinyl]disulfide}, with Cu(OAc)2 and ZnI2 resulted in two 1D (one‐dimensional) coordination polymers 1 and 2, which were well characterized by infrared spectroscopy, elemental analysis, powder X‐ray diffraction, single‐crystal X‐ray diffraction, diffuse‐reflectance UV/Vis as well as photoluminescence spectroscopy. Single crystal X‐ray crystallography discloses that 1 shows an achiral zigzag chain structure built up by alternate linking of paddlewheel Cu2(OAc)4 dicopper unit and 4‐ppds ligand with opposite configurations, whereas 2 exhibits a helical chain structure constructed by alternate linkage of tetrahedral zinc atom and 4‐ppds ligand with the same chirality (P‐ or M‐configuration). It is supposed that the flexible coordination environment around the tetrahedral ZnII ion might be beneficial to homochiral arrangement of 4‐ppds ligand.