Spectroelectrochemistry of pyrrole oligomers in the presence of acrylamide

Abstract

Various soluble pyrrole oligomers -were obtained during electropolymerization of pyrrole in the presence and absence of acrylamide in an acetonitrile solution containing sodium perchlorate and monomers. The role of applied electrical conditions and effect of the presence of acrylamide on the formation of pyrrole oligomers in the solution and resulting polymer on electrode surface were investigated. The soluble and insoluble products were characterized by using UV-visible and FTIR spectroscopy, cyclic voltammetry and four-point probe technique. The resulting polymers on the electrode surface were investigated and the presence of acrylamide in the resulting polymer was supported by electrochemical measurements, spectroscopic results and conductivity. Polypyrrole and poly (pyrrole-acrylamide) free-standing films had conductivities of 90 and 1 S/cm, respectively. The redox properties of the new polymer have been studied for sensor applications. Although the conductivity of the copolymer of pyrrole -with acrylamide decreased about 100 times, it has still a considerable conductivity with better mechanical properties than pure PPy. Moreover, the possible formation of the copolymer of pyrrole with acrylamide may give solubility to the polymer which is very important feature for the practical applications of PPy in industry.

Özet

Pirol radikal katyonlarını stabilize eden ve reaksiyonun spektroskopik ve spektroelektrokimyasal olarak takibini sağlayan akrilamid varlığında pirolün elektropolimerizasyonu sırasında çözünen pirol oligomerleri karakterize edildi Uygulanan elektriksel şartların rolü ve akrilamid varlığının çözeltide oluşan pirol oligomerlerine ve elektrot yüzeyindeki sonuç polimerine etkisi araştırıldı. Çözünen ve çözünmeyen ürünler 4-noka prop tekniği, döngülü voltamogram, UV-görünen ve FTIR spektroskopisi kullanılarak karakterize edildi. Polipirol ve Poli(pirol-akrilamid) serbest duran filmleri sırasıyla 90 ve l S/cm iletkenlik değerleri vermiştir. Spektroskopik siklovoltametrik ve iletkenlik sonuçlan ara ürünlere akrilamidin katıldığını desteklemiştir ki bu endüstride uygulama alanları bulabilir