Impedance Spectroscopy, AC Conductivity, and Conduction Mechanism of Iron(II) Chloride/Polyvinyl Alcohol/Polyvinylpyrrolidone Polymer Blend

Table 1

Absorption band positions and their assignments for PVA/PVP/FeCl₂ composite.

Wave number (cm^−1)	Band assignment	Reference (s)
3,304	OH stretching	[37, 38]
2,929	CH2 asymmetric stretching deriving from PVA	[38, 39]
1,646	CO stretching deriving from PVP	[40, 41]
1,425	Symmetric bending of CH2 deriving from PVA	[42, 43]
1,372	CH2 bending deriving from PVP	[44, 45]
1,290	CH wagging deriving from PVA	[46, 47]
1,090	Stretching vibrations of carbonyl (–C=O) bonds attached to pyrrolidone rings from PVP	[48]
840	CC stretching vibrations deriving from PVA	[47]