**4. Conclusion**

Although polyaniline is among the first know electroconductive polymers, the interest in this field of study still exist, since its diverse and unique properties can be useful in various practical applications. Electrochemical polymerization of aniline and aniline derivates were intensively investigated. Various factors such as: electrode material, dopant anions, electrolyte composition, monomer type, pH etc. were proven to exhibit influence in the electropolymerization process and properties of the desired polymer. The electrochemical synthesis of polyaniline, similar to chemical, is practically always performed in strong acidic

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#### **5. Acknowledgment**

This work was supported by the Ministry of Education and Science, Republic of Serbia, under Contract No. 172046

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**5** 

*México* 

**Electrochemical Preparation and Properties of** 

Polyanilines contain anioniogenic functional groups are denominated self-doped polyanilines. These polymers possess properties different from those of polyaniline (PANI) as suppressed or no need on anion doping during oxidation or reduction processes, solubility in aqueous base, extended redox activity for neutral and basic solution, making them promising applications such as biosensors as a result of physiological pH values, and rechargeable batteries due to the fact that self doping polyanilines are capable of storing more specific energy than PANI as a function of self-doping (Malinauskas, 2004). Therefore it is important the development of these types of polymers, the electrochemical oxidation of 5-amino-2-naphtalensulfonic (ANS) and the luminol can be done a self-doped homopolymer, however the electropolymerizaton of these compounds has not been studied. The chemical structures of these monomers are similar in three aspects (Figure 1): (a) both ANS and luminol contain into their chemical structure the aniline; (b) It is difficult obtain a film of homopolymers to these monomers, because the electroxidation in milium acid of luminol produce a dimmer (De Robertis et al., 2008; Ferreira et al., 2008) in fact the solubility of luminol is bass in this milieu, in these conditions is favored the formation of dimmers; on the other hand no deposition of a polymer onto the electrode has been observed when others amino naphtalensulfonic acid has been electrochemically oxidate, probably for the reason that oligomers are very soluble (Mažeikienė & Malinauskas, 2004). (c) A self-doped polymer can be obtained by copolymerization with aniline and whoever of these monomers

(De Robertis et al., 2008; Ferreira et al., 2008, Mažeikienė & Malinauskas, 2004).

So large of our knowledge there are no reports of the homopolymerization of ANS and luminol, the importance of the synthesis of each films consist in the case of ANS in obtain information of the effect of the separation of group sulfonic to aniline in the ion exchange of film, because the charge compensation has been evaluated principally for ring substituted

**1. Introduction** 

**Novel Conducting Polymers Derived from** 

Luz María Torres-Rodríguez, María Irene López-Cázares, Antonio Montes-Rojas, Olivia Berenice Ramos-Guzmán

*Laboratorio de Electroquímica/ Facultad de Ciencias Químicas/* 

**and from Mixtures of Them** 

*Universidad Autónoma de San Luis Potosí, S. L. P* 

and Israel Luis Luna-Zavala

**5-Amino-2naphtalensulfonic Acid, Luminol** 

range. *Electrochimica Acta*, Vol. 51, No. 20, (May 2006), pp. 4262-4270, ISSN0013- 4686

