Encapsulation of one-dimensional cation chains into pseudo-channels by varying monomers with opposite charge

Abstract

Two compounds with cation chains and monomers, [Co1/2(bpbenz)1/2]+·[Co1/2(oba)]− (1) and [Ni(DPT)(H2O)4]2+ [tpdc]2− (2) have been synthesized under hydrothermal condition (bpbenz = 1,4-bis(4-pyridyl)benzene, H2oba = 4,4′-oxybis- (benzoate), DPT = 2,5-dipyridinethiophene, H2tpdc = biphenyldicarboxylic acid). In compound 1, the monomer [Co1/2(oba)]− anions stack in three orientations to generate a 1D pseudo channels encapsulation of cationic chains [Co1/2(bpbenz)1/2]+. When considering the H-bonding interaction between coordinated water O atoms of the [Co1/2(bpbenz) 1/2]+ cationic chain and uncoordinated carboxylate oxygen atoms of the [Co1/2(oba)]− anion, a binodal 3,6-coordinated 3D architecture is generated. Like 1, the one-dimensional cation chains [Ni(DPT)(H2O)4]2+ locate in pseudo-channels by [tpdc]2− monomers anions in compound 2. A 3D net is also generated considering the H-bonding interaction.