Table 3 Absorption and fluorescence spectral data of Ponceau 4R, Sunset Yellow FCF and Tartrazine in various organic solvents.
Solvent | \({\lambda }_{1max}\)(Abs)(nm) | \({\lambda }_{1max}\)(Fluo)(nm) | \({\phi }_{1}\) | \({\lambda }_{2max}\)(Abs)(nm) | \({\lambda }_{2max}\)(Fluo)(nm) | \({\phi }_{2}\) |
|---|---|---|---|---|---|---|
Ponceau 4R | ||||||
Cyclohexane | 504 | 602 | 0.05 | 553 | 704 | 0.11 |
1,4-Dioxane | 503 | 594 | 0.26 | – | – | – |
Chlorobenzene | 513 | 596 | 0.68 | 555 | 720 | 0.30 |
1-Decanol | 510 | 597 | 0.08 | 564 | 716 | 0.16 |
1-Heptanol | 509 | 595 | 0.10 | 560 | 696 | 0.04 |
Methylamine | 490 | 558 | 0.10 | – | – | – |
Dimethylamine | 497 | 557 | 0.10 | – | – | – |
1-Hexanol | 514 | 602 | 0.33 | 563 | 719 | 0.06 |
1-Butanol | 508 | 587 | 0.15 | 571 | 712 | 0.08 |
2-Propanol | 508 | 594 | 0.15 | 567 | 716 | 0.49 |
Ethanol | 491 | 560 | 0.17 | – | – | – |
Methanol | 494 | 581 | 0.17 | – | – | – |
Ethylene glycol | 496 | 592 | 0.10 | – | – | – |
DMF | 486 | 550 | 0.59 | – | – | – |
DMSO | 487 | 561 | 0.10 | – | – | – |
Water | 507 | 581 | 0.47 | 570 | 711 | 0.10 |
Solvent | \({\lambda }_{1max}\)(Abs)(nm) | \({\lambda }_{1max}\)(Fluo)(nm) | \({\phi }_{1}\) | \({\lambda }_{2max}\)(Abs)(nm) | \({\lambda }_{2max}\)(Fluo)(nm) | \({\phi }_{2}\) |
|---|---|---|---|---|---|---|
Sunset Yellow FCF | ||||||
Cyclohexane | 487 | 562 | 0.21 | 530 | 761 | 0.06 |
1,4-Dioxane | 450 | 541 | 0.09 | – | – | – |
Chlorobenzene | 452 | 558 | 0.54 | – | – | – |
1-Decanol | 487 | 557 | 0.61 | 530 | 780 | 0.14 |
1-Heptanol | 484 | 554 | 0.25 | 526 | 778 | 0.53 |
Methylamine | 488 | 551 | 0.33 | – | – | – |
Dimethylamine | 496 | 554 | 0.13 | – | – | – |
1-Hexanol | 488 | 559 | 0.32 | 532 | 789 | 0.60 |
1-Butanol | 487 | 571 | 0.32 | 540 | 790 | 0.52 |
2-Propanol | 477 | 560 | 0.19 | 531 | 787 | 0.13 |
Ethanol | 484 | 558 | 0.67 | 536 | 785 | 0.12 |
Methanol | 489 | 551 | 0.10 | 532 | 788 | 0.21 |
Ethylene glycol | 490 | 558 | 0.10 | 533 | 781 | 0.16 |
DMF | 509 | 569 | 0.12 | – | – | – |
DMSO | 511 | 567 | 0.38 | – | – | – |
Water | 483 | 545 | 0.14 | 530 | 786 | 0.37 |
Solvent | \({\lambda }_{1max}\)(Abs)(nm) | \({\lambda }_{1max}\)(Fluo)(nm) | \({\phi }_{1}\) | \({\lambda }_{2max}\)(Abs)(nm) | \({\lambda }_{2max}\)(Fluo)(nm) | \({\phi }_{2}\) |
|---|---|---|---|---|---|---|
Tartrazine | ||||||
Cyclohexane | 438 | 529 | 0.51 | 481 | 830 | 0.15 |
1,4-Dioxane | 421 | 504 | 0.24 | – | – | – |
Chlorobenzene | 426 | 507 | 0.04 | – | – | – |
1-Decanol | 431 | 536 | 0.34 | 496 | 846 | 0.13 |
1-Heptanol | 435 | 538 | 0.43 | 495 | 837 | 0.21 |
Methylamine | 422 | 530 | 0.43 | 485 | 841 | 0.18 |
Dimethylamine | 437 | 537 | 0.42 | 482 | – | – |
1-Hexanol | 433 | 536 | 0.38 | 495 | 834 | 0.20 |
1-Butanol | 424 | 531 | 0.17 | 498 | 838 | 0.25 |
2-Propanol | 427 | 533 | 0.39 | 499 | 840 | 0.54 |
Ethanol | 424 | 535 | 0.57 | 487 | 842 | 0.11 |
Methanol | 430 | 530 | 0.45 | 488 | 845 | 0.10 |
Ethylene glycol | 430 | 533 | 0.50 | 501 | 843 | 0.11 |
DMF | 425 | 525 | 0.56 | – | – | – |
DMSO | 450 | 539 | 0.25 | – | – | – |
Water | 438 | 531 | 0.48 | 493 | 842 | 0.03 |
