Synthesis of coordination polymers based on a 2,2′-dimethoxy-1,1′-biphenyl scaffold and Hg(II), Co(II), or Zn(II)

In this study, 3,3'-di(pyridin-4-yl)-(2,2'-dimethoxy-[1,1'-biphenyl ]) (L) was synthetized, structurally characterized by X-ray crystallography and combined with HgCl2, CoCl2, or ZnSiF6 for the formation of three coordination polymers ((HgCl2)(2)(L), (CoCl2)(2)(L)(2)center dot CHCl3, and Zn(SiF6)(L)(2)). The crystal structures of synthesis compound indicate the formation of different types of coordination modes, and each adopts a mono (1D) or tri-dimensional (3D) framework by C-H center dot center dot center dot pi interactions. In (CoCl2)(2)(L)(2), the combination of Co(II) with L forms a metallo-macrocycle, while in the other compounds two helical infinite networks were characterized. Compounds (HgCl2)(2)(L) made of two helical chains with opposite chirality (P and M ), and Zn(SiF6)(L)(2) exhibits helical tubular assemblies of the L attached to two Zn(SiF6)(infinity) pillars. This work may pave the way to further study the chemical, structural and physicochemical properties of metal-organic coordination polymers. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

In this study, three coordination polymers were synthesized and characterized by X-ray crystallography, demonstrating different coordination modes and frameworks. The compounds formed metallo-macrocycles or helical infinite networks, showcasing diverse assembly structures. This work lays the groundwork for further exploration of the chemical, structural, and physicochemical properties of metal-organic coordination polymers.