Research Article
Vanillin-Based Polymers—part II: Synthesis of Schiff Base Polymers of Divanillin and Their Chelation with Metal Ions
Table 3
FT-IR data of divanillin Schiff base polymers (4a–c), metal chelated divanillin Schiff base polymers 4c-Cu(II), 4c-Fe(II), and 4c-Co(II).
| | Polymer | –O–H
(cm−1) | –CH=N–
(cm−1) | –C=C– (Ar)
(cm−1) | –C–O
(cm−1) | Metal-O
(cm−1) | Metal-N
(cm−1) |
| | 4a | 3402 b | 1656 s | 1594 s, 1463 s | 1274 s | — | — | | 4b | 3397 b | 1654 s | 1591 s, 1462 s | 1270 s | — | — | | 4c | 3409 b | 1656 s | 1593 s, 1462 s | 1276 s | — | — | | 4c-Cu(II) | 3408 b | 1643 s | 1586 s, 1463 s | 1268 s | 611 m | 704 m | | 4c-Fe(II) | 3389 b | 1645 s | 1589 s, 1458 s | 1265 s | 588 m | 660 m | | 4c-Co(II) | 3382 b | 1642 s | 1590 s, 1459 s | 1266 s | 601 m | 701 m |
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b: broad, s: sharp, m: medium.
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