Table 2.
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 N-(5-isocyanonaphthalen-1-yl)formamide (1,5-ICNF). The dielectric constants of the solvents (εr) are listed next to the solvent names (see Figure 9).
| Solvent (εr) | 1,5-ICNF | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| λAbs (nm) | ε × 10−3 (M−1cm−1) | λEx (nm) |
λEm (nm) |
Φf | ΔνSS (cm−1) |
λAbs (nm) Implicit Calc. |
λEm (nm) Implicit Calc. |
λAbs (nm) Explicit Calc. |
λEm (nm) Explicit Calc. |
|
| n-Hexane (1.89) | 310 | 4.9 | 310 | 375 | 0.11 | 5591 | 308 | 373 | na | na |
| dimer in hexane | 297 | 367 | ||||||||
| Dioxane (2.25) | 310 | 5.6 | 318 | 396 | 0.55 | 6070 | nc | nc | nc | nc |
| Toluene (2.38) | 313 | 6.0 | 314 | 388 | 0.42 | 6176 | 305 | 375 | nc | nc |
| EtOAc (6.02) | 313 | 6.0 | 313 | 395 | 0.52 | 6600 | nc | nc | nc | nc |
| THF (7.58) | 314 | 6.5 | 324 | 397 | 0.55 | 6658 | 303 | 383 | nc | nc |
| DCM (8.93) | 308 | 5.4 | 307 | 393 | 0.52 | 7022 | 303 | 384 | nc | nc |
| Pyridine (12.4) | 316 | 4.9 | 316 | 397 | 0.005 | 6457 | 305 | 375 | 303 | 378 |
| 2-Propanol (17.9) | 308 | 6.7 | 309 | 399 | 0.41 | 7405 | na | nc | nc | nc |
| Methanol (32.7) | 307 | 6.2 | 306 | 407 | 0.44 | 8081 | 302 | 387 | 295 | 388 |
| DMF (36.7) | 314 | 5.1 | 321 | 408 | 0.61 | 7343 | 302 | 387 | 301 | 392 |
| Acetonitrile (37.5) | 308 | 5.7 | 308 | 403 | 0.44 | 7591 | 302 | 387 | nc | nc |
| DMSO (46.7) | 314 | 5.2 | 322 | 414 | 0.72 | 7669 | 302 | 387 | 336 | 414 |
| Water (80.1) | 296 | 6.1 | 295 | 418 | 0.42 | 9843 | 302 | 388 | 292 | 385 |
nc: not calculated. na: not applicable.