The layered double hydroxide (LDH) Zn2Cr(OH)6Cl.2H2O, denoted [Zn-Cr-Cl], which is an anion-exchanging clay, is rapidly exchanged with electroactive organic sulphonate anions such as m-nitrobenzene sulphonate and anthraquinone mono- and disulphonates. High degrees of reaction are attained, and pillar-like layered structures are formed. Clay-modified electrodes have been produced using these materials and the precursor LDH [Zn-Cr-Cl]. The electrochemical behavior of the substrates listed above, either intercalated or simply adsorbed on the LDH particles, has been studied using cyclic voltammetry.