DNES–CH composite spectrum peaks (λ) Copper treated DNES–CH composite, spectrum peaks (λ) Assignment
3747 3755, 3717 O–H & N–H groups
3357 3376
3304 3338
2986 3001 Carboxyl groups
1741 1717 Amines
1550 1508 N–H bending vibration
1398 1389 C-N, Amines
1224 1182
1022 963
869 872 NH3 rocking vibration
651 632 Cu–O stretching