2D metal–organic frameworks: Syntheses, structures, and electrochemical properties

Abstract Two new 2D metal–organic framework materials, [Cu(Br 2 BDC) 2 ](HTEA) 2 ( 1 ) and [Co 2 (Br 2 BDC)(HCOO) 2 (DMF) 2 ] ( 2 ) (Br 2 BDC = 2,5-dibromoterephthalate, DMF = dimethylformamide, TEA = triethylamine), have been synthesized through solvothermal reactions. Compound 1 consists of anionic layered networks balanced with HTEA + cations located between the layers. The layered network of 1 is a uninodal 4-connected net in which copper ions act as the uninodals and the Br 2 BDC ligand as the linkers. The structure of 2 is a neutral 2D coordination network containing hexagonal rings of clusters formed by six CoO 6 octahedra. The topology of the 2D network in 2 is a uninodal 6-connected net with the clusters as the nodals. In both compounds, the stacking of the layers forms one-dimensional channels. The electrochemical performance of compounds 1 and 2 was also studied using cyclic voltammetry and electrochemical impedance spectroscopy.