Table 1.
FT-IR analyses of the biosynthesized (Cu-NPs), showing the functional groups responsible for bioreduction of metal precursor and capping of the biosynthesized nanoparticles.
| Bond/stretching | Frequency (cm−1) |
|---|---|
| C. officinalis (Cu-NPs) | |
| Water v(O–H) stretching; Protein v(N–H) stretching (amide A) |
3288 |
| Lipid – carbohydrate Mainly vas(CH2) and vs(CH2) stretching |
2926 |
| Protein δs(CH2) and δs(CH3) bending of methyl Carboxylic Acid vs(C–O) of COO– groups of carboxylates Lipid δs(N(CH3)3) bending of methyl |
1406 |
| Carbohydrate v(C–O–C) of polysaccharides | 1033 |
| Carbonate ion | 874 |
| Aryl disulfides (S–S stretch) | 461 |
| C. mediterranea (Cu-NPs) | |
| Water v(O–H) stretching Protein v(N–H) stretching (amide A) |
3301.5 |
| Protein δs(CH2) and δs(CH3) bending of methyl Carboxylic Acid vs(C–O) of COO− groups of carboxylates Lipid δs(N(CH3)3) bending of methyl |
1406.0 |
| Carbonate ion | 873 |
| Alkynes C–H bend | 612 |