International Journal of Interdisciplinary Research
From: Extraction of Indigo dye from Couroupita guianensisand its application on cotton fabric
Wave number (cm−1) | Functional group with mol. motion | Purified pink pigment |
---|---|---|
3500-3300 | Amines N-H stretch (1 per N-H bond) | 3319.26 |
2950-2800 | Alkanes C-H stretch | 2945.10 |
2950-2800 | Alkanes C-H stretch | 2831.31 |
1440-1400 | Carboxylic acids (O-H bend) | 1444.58 |
1200-1025 | C-N stretch (alkyl) Amines | 1114.78 |
1200-1025 | C-N stretch (alkyl) Amines | 1022.20 |