Table 2.

Infrared spectral peaks (cm⁻¹) of polycarbazoles.

	E-PCz-p-TSA	E-PCz	S-PCz-p-TSA	S-PCz
N–H str.	3405	3410	3405	3405
Aromatic C–H str.	3050	3050	3045	3050
Impurity/supertone bands shifted aromatic C–H str./aliphatic C–H str.	2920	2925	2925	2925
δ-OH of moisture (or) C=O str. due to overoxidation	1730	Small peak	1725	NIL
Aromatic ring str.	1600	1600	1600	1605
	1450	1450	1455	1455
C–N str.	1390	1390	1395	1385
	1320	1320	1320	1320
C–N vibration	1235	1230	1235	1230
Due to S=O group	1165	Small peak	1120	V.small
	1060	Small peak	1060	V.small
C–H def. of trisubstituted benzene ring	885	885	880	875
	805	805	805	800
	745	745	745	740