Tribochemistry of Ionic Liquid Lubricant on Magnetic Media

Table 5

Mode assignment and peak positions for the ammonium salt and amide in KBr and as adsorbed on a magnetic layer.

Peak position/cm^−1
Amide		Ammonium salt		Vibration mode
Bulk	Film	Balk	Film
2918	2928	2918	2918	CH2 asymmetric stretching
2850	2856	2850	2858	CH2 symmetric stretching
		1674	1674	COO^− asymmetric stretching
		1404	1404	COO^− symmetric stretching
1692				CO stretching
1232		1232	1246	CF2 asymmetric stretching (E1 symmetry)
1206		1206	1218	CF2 asymmetric stretching (A2 symmetry) + CF3 stretching
1148		1150	1156	CF2 symmetric stretching (E1 symmetry)