Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Table 1

Vibrational bands in FT-IR spectra of emeraldine salt.

As-synthesized emeraldine salt	Heat treated emeraldine salt at				Band assignment
	250°C	490°C	500°C	1000°C
1615	1615	1615	1615	1615	Quinoid
1494	1494	1494	1494	1494	Benzenoid
3440	3440	3440	3440	3440	N–H stretching vibration
3021	3021	3021	3021	3021	C–H stretching vibration of benzene
1300	1300	1300	1300	1300	C–N stretching vibration of quinoid imine
1295	1295	1295	1295	1295	C–N stretching vibration of aromatic amine
2947 and 2878	2947 and 2878	2947 and 2878	2947 and 2878	—	Stretching vibrations of the aliphatic C–H (DBSA)
613	613	613	613	—	HSO4 (from acid dopant)
3500–3700	3500–3700	3500–3700	3500–3700	—	OH stretching vibration of water