Research Article
Synthesis of Malononitrile-Condensed Disperse Dyes and Application on Polyester and Nylon Fabrics
Table 4
Infra-red spectral data for the dyes derived from 4-amino-3-nitrobenzaldehyde.
| DYE | Aromatic C–H | Aliphatic C–H | Carbonyl C=O, Lactum
| Azo N = N | Aldel-hyde CHO, | Cyano C≡N | Hydroxyl OH | Aromatic C–H | Aromatic Nitro NO2 | α-sub Naphthol | β-sub Naphthol | Stretch | Bend | Stretch | Stretch | Stretch | Stretch | Stretch | Bending | Bending |
| D1 | 2925.00 | 2852.00 | | 1406.78 | 1600.07 | — | 3410.53 | 833.81 | 1509.10 | — | — | D2 | 3088.67 | 2849.95 | 1615.31 | 1425.08 | 1689.18 | — | | 821.06 | 1573.38 | — | — | D3 | 2924.40 | — | — | 1404.27 | 1697.93 | — | 3439.49 | — | 1573.76 | 835.85 872.72 | — | D4 | 2960.00 | 2815.00 | — | 1407.95 | 1693.76 | — | 3390.47 | 814.22 | 1557.56 | — | 844.00 878.14 | D5 | 2923.49 | 2880.00 | — | 1428.00 | — | 2357.50 | 3620.08 | 672.36 | 1513.80 | — | — | D6 | 2900.00 | — | 1620.00+ 1678.93− | 1427.00 | — | 2357.61 | — | 672.98 | 1365.00 | — | — | D7 | 2923.50 | 2850.00 | — | 1420.00 | — | 2359.89 | 3600.00 | 672.65 | 1567.64 |
820.00 | — | D8 | 2923.94 | — | — | 1420.00 | — |
2359.81 | 3623.46 | 672.16 | 1550.62 | — | 814.00 |
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