samples C-S in-plane stretching vibration -SO-stretching vibration -SO2- stretching vibration -SO2- stretching vibration -SO3H Stretching vibration
PPS 1092 - - - -
1#
1092
-
1163 (Weaker)
-
-
2#
1090
1038 (Weak) 1157 (Strong) 1321 (Weak) 646 (Strong)
3#
1090
1036 (Strong)
1157 (Strong) 1321 (Weak) 646 (Strong)
4#
1090
1036 (Strong)
1157 (Strong) 1319 (Weak) 646 (Strong)
5#
1090
1036 (Stronger)
1159 (Strong) 1319 (Weak) 642 (Stronger)