Table 3.
Wavenumbers and possible functional groups for the peaks of FTIR spectra in Fig. 4f
| # | Actual wavenumber (cm−1) | Range of wavenumber (cm−1) | Possible functional groups* |
|---|---|---|---|
| 1 | 3305 | 3200–3400 | O–H stretch for phenol and hydroxyl (strong & broad peak) |
| N–H stretch for amide and 1″ and 2″ amine (medium peak) | |||
| 2 | 2915 | 2800–3000 | O–H stretch for carboxyl (variable & broad peak) |
| C–H stretching for alkane (medium peak) | |||
| 2 | 1735 | ~ 1700 | C=O stretch for carbonyls, ester, aldehyde and ketone (strong peak) |
| 4 | 1612 | ~ 1600 | C=C stretch for alkene (medium peak) |
| 5 | 1431 | ~ 1400 | C–H bend and rock for alkane (medium peak) |
| 6 | 1249 | 1200–1300 | C–H wag for haloalkane (medium peak) |
| 7 | 1081 | 1000–1100 | C–O stretch for carboxyl and hydroxyl (variable peak) |
| 8 | 1016 | 1040–1050 | C–O stretch for carboxyl and hydroxyl (variable peak) |
| 1030–1070 | S=O stretch for sulfoxide (strong peak) | ||
| 995–985 | C=C bend for alkene (strong peak) | ||
| 9 | 763 | 700–800 | N–H wag for 1″ and 2″ amine (strong & broad peak) |
| C–H bend for alkene (strong & broad peak) |