Table 1 FT-IR bands attributed to soluble polysaccharides and silver nanoparticles
(PSP) IR bands (cm−1) | Ag-NPs IR bands (cm−1) | Functional groups |
|---|---|---|
3282 | 3282 | O–H str |
3084 | Disappear | C–H str (sym) of –CH3 |
2909 | 2938 | C–H str (asym) of > CH22909 |
2874 | Disappear | C–H str (sym) of –CH3 |
1625 | 1632 | Asymmetric and symmetric vibration of carboxylate |
1530 | 1547 | Amide II |
1452 | 1467 | CH def of > CH2 |
1413 | 1443 | C=O str (sym) of COO |
1345 | Disappear | – |
1323 | 1284 | – |
1239 | 1215 | C–O–C, C–O dominated by ring vibrations of carbohydrates |
1078 | 1093–1043 | CO–C stretching |
949 | 930 | – |
889 | Disappear | – |
827 | 801 | – |
732 | 784 | CH rocking of > CH2 |
675 | Disappear | Skeletal deformation bands |
609 | Disappear | – |
451 | 447 | – |