| Compound | Solvent | (nm) |
| Isatin | DMSO | 334, 418 | Ethanol | 249, 296, 420 | Toluene | 295, 405 | | 249, 296, 415 |
| | DMSO | 284, 363, , 481 | Ethanol | 265, 353, 363, 393, 491 | Toluene | 282, 349, 361, 387, 473 | | 263, 291, 365, 473 |
| | DMSO | 248, 349, 365, 358, 448 | Ethanol | 243, 261, , 389, 481 | Toluene | 289, 345, 357, 387, 452 | | 263, 297, 343, 379, 446 |
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