Table 3.
Comparison FTIR Spectra Of TM Extracts And Their Respective AgNPs
| aTML | aTMSB | |||||||
|---|---|---|---|---|---|---|---|---|
| Peak Position In Extracts (cm−1) | Peak Position In AgNPs At 25 °C (cm−1) | Shift In Position (cm−1) | Type Of Chemical Bond | Peak Position In Extracts (cm−1) | Peak Position In AgNPs at 70°C (cm−1) | Shift In Position (cm−1) | Type Of Chemical Bond | |
| 1338.32 | 1384.39 | +46.07 | C–H methyl rock alkanes | 1048.80 | ---------- | ---------- | C-O Stretch | |
| 1640.29 | 1638.56 | −1.73 | –C=C–stretch alkenes | 1131.16 | ---------- | ---------- | ||
| 1876.99 | 1884.90 | +7.91 | C=O Anhydrides | 1384.03 | 1384.96 | +0.93 | C-H methyl rock alkanes | |
| 2946.61 | 2830.64 | −115.97 | H–C=O:C–H stretch aldehydes | 1639.21 | 1638.68 | −0.53 | –C=C– stretch alkenes | |
| 3530.47 | 3417.07 | −112.48 | OH Alcohol, phenols | 2016.03 | 2034.58 | +18.55 | –C≡C– stretch alkynes | |
| 3545.10 | 3417.99 | −127.11 | 2930.41 | 2789.28 | −141.13 | H–C=O:C–H stretch aldehydes | ||
| 3647.29 | 3712.96 | +65.67 | 3530.72 | 3530.35 | +0.37 | OH Alcohol, phenols | ||
| 3544.94 | 3544.99 | +0.05 | ||||||
| 3717.06 | 3731.61 | +14.55 | ||||||
Note: Shift values were calculated by subtracting the peak position in TM-AgNPs from the peak position in TM-extracts.
Abbreviations: FTIR, Fourier-transform infrared; AgNPs, silver nanoparticles; TM, Terminalia mantaly; aTML, aqueous TM leaf extracts; aTMSB, aqueous TM stem bark.