Table 4 The characteristic indexes of the leaf-derived surfactant powder given by FTIR spectra.
Wavenumber (cm−1) | Peak height (%) | Transmittance (%) | Group | Compound class | Reference(s) |
|---|---|---|---|---|---|
3742.39 | 19.3697 | 0.89624 | Stretching Non-hydrogen-bonded O–H | Hydroxyl | |
3415.91 | 100 | 0.56304 | Stretching O–H | Hydroxyl | |
2924.05 | 40.3826 | 0.79398 | Stretching C–H | Aliphatic | |
2362.34 | 30.9851 | 0.83819 | Stretching O=C=O | Carbon dioxide | |
1626.69 | 89.5761 | 0.59792 | Bending H–O–H | Adsorbed water | |
1566.81 | 1566.81 | 0.60048 | Carboxylate (COO−) | Carbonyl | |
1405.71 | 70.3201 | 0.66812 | Symmetrical stretching of carboxylate (COO−) | Carbonyl | |
1084.94 | 30.4529 | 0.84076 | Stretching C–O | Secondary alcohol | |
661.511 | 24.2177 | 0.87153 | Bending C–H (out-of-plane) | Aliphatic |
