Spectroscopic Characterization of Poly(ortho-Aminophenol) Film Electrodes: A Review Article

Table 4

Vibration modes observed by Raman spectroscopy in POAP-modified Au electrodes at 0.1 V in 1 M HClO₄ [58].

Wavenumber/cm^−1	Vibration modes
1638	–C=N– stretching of quinonimine units
1593	>C=C< stretching of quinoid units or
	N–H^+ deformation vibration on secondary amines
1520	–C=C– stretching in the aromatic ring
1474	–C=N– stretching of quinoid units
1390	C–C stretching of quinoid units
1328	>C–N^∙+– stretching
1160	C–H bending in plane
925	Perchlorate vibration band
576	Ring deformation of benzenoid units