Abstract
The asymmetric unit of the title coordination polymer, [Co(C9H4N2O4)(C2H4N4)] n or [Co(L 1)(L 2)] n , consists of one crystallographically independent Co2+ centre, one L 1 2- ligand and one L 2 ligand (L 1 = 1H-benzimidazole-5,6-di-carb-oxy-lic acid, L 2 = 3-amino-1,2,4-triazole). The Co2+ centre is coordinated by two carboxyl-ato-O atoms from two independent L 1 2- ligands and two nitro-gen atoms from L 2 and another L 1 ligand. Thus, the metal center adopts a four-coordinate mode, forming a tetra-hedral geometry. Inter-estingly, through the combination of two L 1 2-, two L 2 ligands and two Co2+ ions, a basic repeating unit is constructed, resulting in the formation of a one-dimensional straight chain structure. These chains are further expanded to the final three-dimensional framework via N-H⋯O hydrogen-bonding inter-actions.
Highlights
(C2H4N4)]n or [Co(L1)(L2)]n, consists of one crystallographically independent Co2+ centre, one L12À ligand and one L2 ligand (L1 = 1H-benzimidazole-5,6dicarboxylic acid, L2 = 3-amino-1,2,4-triazole)
The Co2+ centre is coordinated by two carboxylato-O atoms from two independent L12À ligands and two nitrogen atoms from L2 and another L1 ligand
Over the past two decades, coordination polymers (CPs) have been demonstrated to represent a new type of crystalline organic–inorganic hybrid materials, and are unique in terms of their potentially high porosities, tunable pores, and diverse compositions (Du et al, 2013; Kitagawa et al, 2007; Cui et al, 2016). These features have enabled CPs to be constructed with great potential for various applications, such as gas adsorption/separation (Zhao et al, 2018), chemical sensing (Huang et al, 2017), heterogeneous catalysis (He et al, 2020) and energy storage/conversion (Lu et al, 2020)
Summary
Over the past two decades, coordination polymers (CPs) have been demonstrated to represent a new type of crystalline organic–inorganic hybrid materials, and are unique in terms of their potentially high porosities, tunable pores, and diverse compositions (Du et al, 2013; Kitagawa et al, 2007; Cui et al, 2016) These features have enabled CPs to be constructed with great potential for various applications, such as gas adsorption/separation (Zhao et al, 2018), chemical sensing (Huang et al, 2017), heterogeneous catalysis (He et al, 2020) and energy storage/conversion (Lu et al, 2020). E77, 714–717 synthesis and crystal structure of the title coordination polymer poly[(3-amino-1,2,4-triazole)(3-1H-benzimidazole5,6-dicarboxylato)cobalt(II)] (1), which was prepared by the solvothermal method using two simple ligands and a cobalt salt
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