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**6** 

*Iran* 

**Electrosynthesis and Characterization** 

Nasser Arsalani1, Amir Mohammad Goganian1, Gholam Reza Kiani3,

**of Polypyrrole in the Presence of** 

**2,5-di-(2-thienyl)-Pyrrole (SNS)** 

Mir Ghasem Hosseini2 and Ali Akbar Entezami1

*Faculty of Chemistry, University of Tabriz, Tabriz,* 

*Faculty of Chemistry, University of Tabriz, Tabriz,* 

*1Polymer Research Laboratory, Department of Organic Chemistry,* 

*2Electrochemistry Research Laboratory, Department of Physical Chemistry,* 

*3School of Engineering-Emerging Technologies, University of Tabriz, Tabriz* 

Electronically conducting polymers are a very popular research field among the chemists due to their use in a wide variety of marketable applications such as electrochromic devices [Mortimer et al., 2006; Sahin et al., 2005], polymer light-emitting diodes (LEDs) [Kraft et al., 1998], artificial muscles [Cortes & Moreno, 2003], gas sensors [Nicolas-Debarnot & Poncin-Epaillard, 2003], bio sensors [Geetha et al., 2006; Malinauskas et al., 2004] and corrosion protection of metals [Hosseini et al., 2007, 2008; Oco´n et al., 2005]. The preparation, characterization and application of electrochemically active, electronically conjugated polymeric systems are in the foreground of research activities in electrochemistry [Heinze et al., 2010]. Among the conducting polymers, polypyrrole has attracted a lot more interests [Jang & Oh, 2004; Zhang et al., 2006; Chang et al., 2009]. This polymer is easy to synthesize both chemically and electrochemically, exhibiting good electrical conductivity and relatively good stability under ambient conditions, but lacking

In order to improve the electroactivity and redoxability of the electro-synthesized polypyrrole, another molecule containing conjugated system can be used during the electropolymerization of pyrrole. 2,5-di-(2-thienyl)-pyrrole (SNS) is one of the molecules containing conjugated system and have been studied by various electrochemical methods such as cyclic voltammetry, chronopotentiometry, and chronoamperometry under different conditions (changing the electrolyte, electrode, electrochemical potential range and etc)

Entezami et al. have studied the electropolymerization of pyrrole and *N*-methyl pyrrole in the presence of 1-(2-pyrrolyl)-2(2-thienyl) ethylene (PTE) and 2-(2-thienyl) pyrrole (TP) by cyclic voltammetry in different conditions [Kiani et al., 2001]. Recently, we have studied the electropolymerization of thiophene and 3-Methyl thiophene in the presence of small amount

**1. Introduction** 

good electroactivity and redoxability.

[Otero et al., 1998; Brillas et al., 2000; McLeod et al., 1986].

Zhang, L.; Jiang, X.; Niu, L & Dong, S., (2006). Syntheses of fully sulfonated polyaniline and its application to the direct electrochemistry of cytochrome C, *Biosensors & Bioelectronics*, Vol. 21, No. 7, pp. 1107-1115, ISSN 0956-5663
