Abstract: Using  5,5′-(5,5-half dioxide  [b,d] thiophene-3,7-digroup) diphthalic acid (H₄DTPA) as an organic ligand,  we constructed a new metal-organic framework compound [NH₂(CH₃)₂][Zn₃(DTPA)₂]xsolvent  through solvothermal synthesis method. This compound is a novel topological network structure with a  {4,8}-connected anionic framework, with good chemical and thermal stability, and good selective  adsorption performance for organic dye methylene blue (MB).

Key words: metal-organic framework, anionic framework, dye adsorption