Table 1 Absorption maxima of Neutral Red(NR) in various solvents and selective Kamlet-Taft solvent properties
From: Solvent effect on the spectral properties of Neutral Red
Solvent | λ(nm) | π* | α | β | ε | n |
|---|---|---|---|---|---|---|
Water | 527 | 1.09 | 1.17 | 0.18 | 80.1 | 1.3330 |
Propan-1-ol | 538 | 0.52 | 0.84 | 0.90 | 20.33 | 1.3856 |
Chloroform | 522 | 0.58 | 0.44 | 0.0 | 4.81 | 1.4429 |
Acetonitrile | 531 | 0.75 | 0.19 | 0.31 | 38.80 | 1.3440 |
DMSO | 546 | 1.0 | 0.0 | 0.76 | 47.2 | 1.4790 |
Ethanol | 537 | 0.54 | 0.83 | 0.77 | 24.55 | 1.3614 |
Acetone | 525 | 0.71 | 0.08 | 0.48 | 20.70 | 1.3590 |
DMF | 540 | 0.88 | 0.0 | 0.69 | 38.3 | 1.4305 |
Acetic acid | 534 | 0.64 | 1.12 | - | 6.2 | 1.3710 |
Ethyleneglycol | 539 | 0.92 | 0.9 | 0.52 | 38.7 | 1.4310 |
Nitrobenzene | 544 | 1.01 | 0.0 | 0.39 | 32.0 | 1.5510 |