Table 5 Functional groups from the FTIR-analysis
Functional groups | Wavenumber (cm−1) | Peak strength | |
|---|---|---|---|
*Predicted | Observed | ||
C-H2 bending | 1450 | 1444.2 | Weak |
C = O ketone | 1738 | 1737.5 | Strong |
C-O | 1245 | 1240.8 | Strong |
C-N | 1092 | 1091.4 | Medium |
C = O stretching | 1700 | 1704.0 | Weak |
=C-O-C asymmetrical stretching | 1254 | 1256.0 | Strong |
O-H alcohol-strong and broad | 3429 | 3430.2 | Strong |