Table 6.

FT-IR frequencies in cm⁻¹ and assignments.

PLA	Assignment	IL	Assignment	GO	Assignment
2947	-C-H3 [46,47]	2964	C-H [50,51] CH3 [50,51]	3500, 3000	O-H [55,56,57]
2882	-C-H [46] -C-H3 [47]	2877	CH3 [49]	1719	C=C [56] C=O [55,56,57]
2297	CH3 [46,47]	1470	CH2 [50] CH3 [51,52]	1617	C=O [55,56,57] C=C [56]
1747	C=O [46,47,48,49]	871	P-F ring [50]	1037	C-OH C-O [57,58]
1452	CH3 [46,47,49]	814	PF6 [51,53] C-H [53]	980	COOH C-O [58]
1360	-C-H3 [47,49] C H-CH3 [46]	559	F-P-F PF6 [54]
1180	C-O-C [47,48,49] -C-O [46]
1130	C-O-C [47] ras CH3 [46]
1090	C-O-C [46,47]
1045	C-C [46] C-O-C [47,48,49]
760	αCH3 [47] C=O [46]
695	C=O [46]