Comparison of FT Raman spectra of some 5-nitroquinoxalines and their electropolymers

FT Raman spectroscopy was used to characterize a set of five newly synthesi zed 5-nitroquinoxaline derivatives 2,3-disubstituted with 2-pyrrolyl, 2-fur yl, 2-thienyl, phenyl and 2-pyridyl groups. Afterwards the 5-nitroquinoxali nes were electrochemically reduced to 5-aminoquinoxalines and electropolyme rized as films on the Pt electrode coated with porous Au. Comparing the SER S spectra of polymers with the Raman spectra of monomers, a mechanism of po lymerization has been suggested. Specific spectral and electrochemical prop erties of films based on pyrrole substituted 5-aminoquinoxaline were verifi ed by electropolymeriration of 2,3-dipyrrol-2 ' -yl-5-nitroquinoxaline with out a reduction step. (C) 2001 Elsevier Science B.V. All rights reserved.