Formation of a potassium coordination polymer based on a novel 2-sulfono-benzene-1,3,5-tricarboxylic acid: Synthesis, characterization, and application of the organocatalyst in CO2 cycloaddition reaction

•A novel 3D potassium coordination polymer containing a novel 2-sulfono-benzene-1,3,5-tricarboxylic acid.•Synthesis of a novel bifunctional sulfonate-carboxylate organic ligand, 2-sulfono-benzene-1,3,5-tricarboxylic acid.•Usage of the potassium coordination polymer as a novel and simple organocatalyst in the CO2 cycloaddition reaction.