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    STUDIA PHYSICA - Issue no. SPECIAL ISSUE / 2001  
         
  Article:   SPECTROSCOPIC INVESTIGATION OF THE ELECTRON DELOCALIZATION AND MOLECULAR CONFORMATIONAL CHANGES IN POLYPYRROLE INDUCED BY DIFFERENT DOPING IONS.

Authors:  R. TURCU, R. GRECU, M. BRIE, I. PETER, A. BOT, W. GRAUPNER.
 
       
         
  Abstract:  We report a comparative study of the optical properties of polypyrrole (PPY) synthesized by two methods: electrochemical and chemical oxidation of the monomer (pyrrole) in the presence of different doping ions (p-toluensulfonate, dodecylsulfate, dodecylbenzenesulfonate, perchlorate, tetrafluoroborate). By using FTIR and UV-Vis spectroscopy we investigated the changes of the molecular and electronic structure of polypyrrole induced by the preparation conditions. Our main goal was to find out the relevant synthesis parameters, which have a strong influence on the electron delocalization length and the molecular architecture of polypyrrole.  
         
     
         
         
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