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Absorption maxima of the charge transfer band of CYV (λAbs) and main absorption band of CURC (λCURC) in selected solvents.
| Solvent | λAbs (nm) | λCURC (nm) | |
|---|---|---|---|
| Non Polar | Cyclohexane | 355 | 408,429 |
| Polar weakly H-bonding | Chloroform | 372 | 419 |
| Ethyl acetate | 367 | 419 | |
| Acetone | 370 | 420 | |
| Acetonitrile | 370 | 419 | |
| Strong H-bond acceptors | DMFA | 383 | 431 |
| DMSO | 386 | 434 | |
| Alcohols | Ethanol | 387 | 430 |
| Methanol | 385 | 423 | |
