Each anion had a carboxylate group and at least one other polar moiety.

The carboxylate group of the benzoate moiety must be in ortho position to the amino group.

The free carboxylate group(s) in the MOFs inspire us to elaborate their metal capturing properties.

The carboxylate group of propionate bound in the active site makes numerous interactions with active-site residues, defining the substrate binding site of the enzyme.

These differences may be explained by the large hydration potential of Arg and the formation of a salt bridge with a carboxylate group of oxaloacetate.

Here the organic ligand acts as tetradendate linker via two of the carboxylate groups.

Surprisingly, the ion selectivity of the smaller diameter pore containing three carboxylate groups can be tuned by changing the magnitude of the applied voltage bias.

The copper (II) ions are in a distorted tetrahedral environment sequentially bridged by carboxylate groups in the syn-anti conformation giving rise to a helix-like chain.