Thermally Stable Forms of Pure Polyaniline Catalyzed by an Acid-Exchanged Montmorillonite Clay Called Maghnite-H⁺ as an Effective Catalyst

Table 1

The vibration frequencies of PANI-ES and PANI-EB.

Vibration frequencies cm^−1
PANI-EB	PANI-ES	Assignment
3631	3288	Asymmetric N–H stretching
1555	1557	Aromatic C–C stretching
1295	1293	C–N stretching of secondary aromatic amine
1174	1168	C–H in plane bending 1,4 disubstituted benzene
849	838	Out of plane C–H bending 1,4- disubstituted benzene ring