Table 1. HOMO Energies (EHOMO), LUMO Energies (ELUMO), and the Dipole Moment of the Natural Pigments.
| dye molecule | EHOMO (eV) | ELUMO (eV) | dipole moment (μ) (Debye) |
|---|---|---|---|
| indigo | –5.7 | –3.9 | 0.0053 |
| lawsone | –5.3 | –2.6 | 5.7816 |
| betanin26 | –5.2 | –3.1 | 8.6895 |
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