Assembly of silver(I) one- and two-dimensional coordination frameworks with 2-ethynyl-4,6-dimethylpyrimidine ligand

Abstract

The reactions of ethynide ligands and silver(I) trifluorocarboxylate under solvent evaporation conditions yielded two silver-organic frameworks, namely, [(AgL)(AgCF3CO2)4(H2O)2] (1) and [(AgL)(AgCF3CO2)3] (2) (HL = 2-ethynyl-4,6-dimethylpyrimidine). In complex 1, Ag10 aggregates are linked by trifluoroacetate groups to produce infinite chains, which are further linked through interchain hydrogen bonds into a three-dimensional supramolecular framework. In 2, Ag8 aggregates are fused together through trifluoroacetate groups to give rise to 2D metal-organic layer. These structural differences indicate that molar ratio of the molecular components plays important role in defining the overall structures of metal-organic frameworks.