“…S-1. † The peaks appeared at 2930 cm À1 (aliphatic C-H stretching), 1660 cm À1 (stretching vibration of C]N), 1490 cm À1 (in-plane bending vibration of -CH 3 , -CH 2 -) 34,39 and 830 cm À1 (PF 6 À ) 38 which is in keeping with the literature data showing the synthesis of the OPFP ionic liquid. Because MWCNTs do not support a static dipole moment, a relatively weak dynamic dipole moment is responsible for the observation of the infrared-active modes of MWCNTs.…”