Table 1: Band assignments of sub-peak and variation range of positions and widths of solvent-soluble [32,33].
| Band assignments of hydrogen bonds | Band position(cm-1) | Width(cm-1) |
|---|---|---|
| Free OH groups | 3611 | 30 |
| OH-π hydrogen bonds | 3530 ± 10 | 50 ± 20 |
| Self-associated n-mers (n > 3) | 3400 | 100 ± 10 |
| OH-ether O hydrogen bonds | 3280 ± 35 | 70 ± 15 |
| Tightly bound cyclic OH tetramers | 3150 ± 50 | 60 ± 10 |
| OH-N (acid/base structure) | 3100-2800 | - |
| COOH dimers | 2640 | - |