Table 1.
The absorption maximum wavelengths (λAbs), the molar extinction coefficients at λAbs (ε) the fluorescence emission maxima (λEm), and the quantum yields (Φf) determined in various solvents for 1,5-diisocyanonaphthalene (DIN). The dielectric constants of the solvents (εr) are listed next to the solvent names.
| Solvent (εr) | Experimental | Computed | ||||
|---|---|---|---|---|---|---|
| λAbs (nm) | ε × 10−3 (M−1cm−1) | λEm (nm) |
Φf (%) |
λAbs (nm) |
λEm (nm) |
|
| n-Hexane (1.89) | 300 | 10.3 | 329, 344 | 13.2 | 290 | 349 |
| Dioxane (2.25) | 302 | 14.2 | 331, 346 | 17.7 | nc | nc |
| Toluene (2.38) | 302 | 11.0 | 352 | 21.4 | 291 | 352 |
| EtOAc (6.02) | 300 | 14.9 | 330, 345 | 15.7 | nc | nc |
| THF (7.58) | 300 | 11.6 | 331, 346 | 14.8 | 291 | 360 |
| DCM (8.93) | 302 | 14.6 | 331, 346 | 10.0 | 291 | 361 |
| Pyridine (12.4) | 304 | 9.8 | 337, 352 | 0.7 | nc | nc |
| 2-Propanol (17.9) | 300 | 13.3 | 330, 345 | 19.4 | nc | nc |
| Methanol (32.7) | 300 | 12.0 | 330, 345 | 18.3 | 290 | 365 |
| DMF (36.7) | 302 | 13.3 | 333, 347 | 1.1 | 291 | 365 |
| Acetonitrile (37.5) | 300 | 11.4 | 330, 345 | 20.6 | 290 | 365 |
| DMSO (46.7) | 303 | 11.3 | - | 0.5 | 291 | 365 |
| Water (80.1) | 300 | 4.0 | 330, 345 | - | 290 | 366 |
nc: not calculated.