Fig. 1: Schematic representation of interlayer structures and molecular structures of carboxylic acids.

Interlayer structures of OCP incorporated with a isophthalate ion, b phthalate ion dimer, and c molecular structure of pyromellitic acid.

Interlayer structures of OCP incorporated with a isophthalate ion, b phthalate ion dimer, and c molecular structure of pyromellitic acid.