Table 1.
Assignment of vibrations and corresponding wavenumbers to characteristic bands in IR spectra of surface-modified materials.
| Sample | ν(OH) | ν(SiOSi)s | ν(SiOSi)as | δ(SiOSi) | δ(OH) | ν(CH)aliph | δ(CH) | δ(NH2) | ν(NH2) |
|---|---|---|---|---|---|---|---|---|---|
| SBA-15(C) | 3437 | 809 | 1088 | 462 | 1638 | - | - | - | - |
| SBA-15(C)-Cl | 3427 | 800 | 1100 | 466 | 1638 | 2981 | 1453 | - | - |
| 2931 | |||||||||
| 2900 | |||||||||
| SBA-15(C)-800 | - | 800 | 1100 | 475 | 1656 | 2954 | 1462 | 1602 | 3360 |
| 2837 | 3300 | ||||||||
| SBA-15(C)-1300 | - | 800 | 1124 | 475 | 1638 | 2952 | 1462 | 1603 | 3283 |
| 2837 | 3301 | ||||||||
| SBA-15(C)-2000 | - | 804 | 1098 | 475 | 1629 | 2953 | 1462 | 1602 | 3251 |
| 2838 | 3300 |
ν—stretching; δ—scissoring; as—asymmetric; s—symmetric; ar—aromatic; aliph—aliphatic.