Table 3 Peak values and functional groups of Pg dried extract in the FT-IR spectra
Characteristic absorptions [cm− 1] leaves extract / stems extract | Functional group | Bond | Intensity |
|---|---|---|---|
3392.79 | Alcohol | O-H stretch (H-bonded) | Strong, broad |
2926.01 | Alkanes | C-H stretch | Strong |
2854.65 | Aldehyde | =C-H stretch | Medium, two peaks |
1685.79 / 1629.85 | Alkene | C=C stretch | Variable |
1604.77 | Aromatics | C=C stretch | Medium-weak, multiple bands |
1514.12 / 1375.25 | Nitro | N-O stretch | Strong, two bands |
1450.47 | Alkane | C-H bending | Variable |
1267.23 | Carbonyl acids | C-O stretch | Strong |
Amine | C-N stretch | Medium - weak | |
1163.08 | Amine | C-N stretch | Medium - weak |
1074.35 / 1033.85 | Alcohol | C-O strecth | Strong |
Ester | C-O stretch | Two bands or more | |
831.32 / 765.74 / 698.23 | Alkene | =C-H bending | Strong |
Alkyl Halide | C-Cl stretch | Strong | |
518.85 | Alkyl Halide | C-Br stretch | Strong |