Table S2.
FTIR data of HA-ss-FA conjugate
| cm−1 | Proposed assignments
|
|
|---|---|---|
| HA | FA | |
| 3,270 (s) | ν(O–H) H bonded | ν(O–H) H bonded |
| 2,887 (m) | ν(C–H) | – |
| 1,603 (s) | νas(C–O)[COOH] | νas(C–O)[COOH] bonded |
| 1,451 (m) | νs(C–O)[COOH] | – |
| 1,402–1,300 (m) | δ(C–H)[CH2] | δ(C–H)[CH2] |
| 1,031 (s) | ν(C–OH) | – |
| 1,507 (sh) | – | C–C stretch (in-ring) aromatics |
| 832 (sh) | – | Ar–H |
Note: “–” indicates no data.
Abbreviations: Ar–H, aromatic hydrogen; FA, folic acid; FTIR, Fourier transform infrared; HA, hyaluronic acid; s, strong; m, medium, sh, sharp.