Table 1 |
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Maximum absorption (λabs) and emission (λem) wavelengths, molar absorption coefficients (ε) and fluorescence quantum yields of compounds 1 and 2 in several solvents |
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|
Solvent |
λabs (nm) (ε/104 M-1 cm-1) |
λem (nm) |
ΦF |
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|
1 |
2 |
1 |
2 |
1 |
2 |
|
|
|
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|
Cyclohexane |
398 (0.84); 377 (1.24); 360 (1.27); 305 (0.95); 258 (3.93) |
411 sh (0.33); 354 (2.19); 347 (2.37); 308 (1.25); 291 (1.12); 270 (1.40) |
402; 426; 452 sh |
417; 441 |
0.20 |
0.047 |
|
Dioxane |
398 (0.76); 377 (1.18); 359 (1.20); 305 (1.17); 258 (3.60) |
411 sh (0.66); 356 (5.36); 346 (5.40); 309 (3.23); 291 (2.98); 272 (3.33) |
407; 428; 455 sh |
425; 449 |
0.29 |
0.054 |
|
Dichloromethane |
397 (0.58); 377 (0.91); 360 (0.93); 305 (0.97); 259 (2.70) |
410 sh (0.55); 357 (4.37); 311 (2.28); 290 (2.29); 273 (2.78) |
408; 429 |
427; 448 |
0.26 |
0.022 |
|
Acetonitrile |
395 (0.68); 376 (1.06); 358 (1.06); 304 (1.09); 256 (3.32) |
409 sh (0.66); 355 (5.76); 308 (3.41); 289 (3.20); 271 (3.67) |
408; 428 |
450 |
0.21 |
0.036 |
|
N,N-Dimethylformamidea |
397 (0.78); 377 (1.19); 360 (1.16); 305 (1.19) |
411 sh (0.69); 356 (5.52); 311 (3.11); 290 (2.86) |
411; 430 |
453 |
0.30 |
0.047 |
|
Dimethylsulfoxidea |
397 (0.77); 378 (1.17); 361 (1.14); 305 (1.17) |
412 sh (0.61); 357 (4.70); 313 (2.52) |
413; 432 |
455 |
0.28 |
0.048 |
|
Ethanol |
396 (0.69); 375 (1.13); 358 (1.17); 304 (1.40); 256 (3.59) |
408 sh (0.72); 355 (5.50); 311 (2.95); 272 (3.69) |
412; 431 |
452 |
0.27 |
0.041 |
|
Methanol |
395 (0.67); 374 (1.08); 358 (1.10); 304 (1.34); 256 (3.43) |
408 sh (0.62); 354 (5.00); 311 (2.80); 272 (3.41) |
413; 433 |
453 |
0.26 |
0.040 |
|
Water |
394 (0.41); 374 (0.57); 361 (0.58); 303 (0.93); 256 (2.07) |
420 sh (0.26); 358 (0.87); 314 (0.94); 278 (0.97) |
413 sh; 433 |
505 |
0.22 |
0.012 |
|
|
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aSolvent cut-offs: N,N-Dimethylformamide: 275 nm; Dimethylsulfoxide: 280 nm; sh: shoulder. |
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Castanheira et al. Nanoscale Research Letters 2011 6:379 doi:10.1186/1556-276X-6-379 |
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