Table 2 IR absorption peak shifts. The IR absorption peak shifts suggest different functional groups on the surface of the strain.
Control sample | Treated sample | Functional group |
|---|---|---|
3679.66 | 3679.66 | -OH (Hydroxyl -Alcohols) stretching: Hydroxyl groups in alcohols or phenols, without hydrogen bonding. |
- | 3290.10 | -OH (hydroxyl and carboxylic acid) stretching: Alcohols or phenolic compounds with hydrogen bonding. |
2969.96 | 2937.17 | -C-H (Alkyl; especially methyl and methylene groups) stretching: Aliphatic compounds, particularly CH₂ groups in lipids or other organic materials. |
2003.76 | 2001.83 | -C ≡ C alkynes stretching: Alkyne functional group, associated with triple bonds between carbon atoms. |
1606.45 | 1621.90 | -C = C (alkene) stretching: Double bonds in alkenes or aromatic rings. |
1390.48 | 1398.19 | methyl groups (− CH₃) bending: Methyl groups involved in bonding, found in proteins and other organic compounds. |
1056.84 | 1054.91 | -C-O (alcohols and ethers) stretching: Polysaccharides, nucleic acids, phospholipids. |
622.92 | 624.84 | C-H aromatic compounds bending: Aromatic compounds |
