Table 1.
The absorption maximum wavelengths (λAbs) and the molar extinction coefficients at λAbs (ε) determined in various solvents for the 1,5-diaminoanthracene (DAA) and its isocyano derivatives (ICAA, MICAA, DIMICAA). The dielectric constants of the solvents (εr) are listed next to the solvent names.
| Solvent (εr) | DAA | ICAA | MICAA | DIMICAA | ||||
|---|---|---|---|---|---|---|---|---|
| λAbs (nm) | ε ×10−3 (M−1cm−1) | λAbs (nm) | ε ×10−3 (M−1cm−1) | λAbs (nm) | ε ×10−3
(M−1cm−1) |
λAbs (nm) | ε ×10−3 (M−1cm−1) | |
| n-Hexane (1.89) | 403 | 4.4 | 412 | 3.9 | 432 | 3.9 | 397 | 4.9 |
| Toluene (2.38) | 409 | 5.4 | 420 | 3.8 | 433 | 4.1 | 401 | 4.8 |
| DCM (8.93) | 407 | 4.7 | 417 | 3.9 | 431 | 4.0 | 404 | 4.8 |
| 2-propanol (17.9) | 403 | 4.6 | 426 | 3.6 | 434 | 3.9 | 403 | 4.9 |
| THF (7.58) | 416 | 5.0 | 435 | 3.1 | 445 | 3.7 | 404 | 4.8 |
| Chloroform (4.81) | 404 | 4.6 | 414 | 3.8 | 431 | 3.9 | 404 | 4.8 |
| EtOAc (6.02) | 411 | 4.8 | 425 | 3.2 | 437 | 4.0 | 400 | 4.9 |
| Dioxane (2.25) | 415 | 5.2 | 426 | 3.7 | 438 | 4.1 | 402 | 5.1 |
| Acetone (20.7) | 415 | 4.8 | 430 | 3.2 | 441 | 3.7 | 400 | 4.6 |
| Methanol (32.7) | 406 | 4.4 | 426 | 3.3 | 427 | 3.7 | 398 | 4.9 |
| Pyridine (12.4) | 423 | 5.7 | 426 | 3.1 | 451 | 4.0 | 407 | 4.8 |
| Acetonitrile (37.5) | 410 | 5.0 | 422 | 3.7 | 434 | 4.0 | 403 | 4.9 |
| DMF (36.7) | 421 | 5.4 | 442 | 3.1 | 449 | 3.9 | 404 | 4.9 |
| DMSO (46.7) | 426 | 5.3 | 444 | 3.4 | 451 | 4.0 | 409 | 4.9 |
| Water (80.1) | 395 | 4.6 | 410 | 3.6 | 415 | 3.4 | 400 | 3.9 |