Table 7. PC Property Comparison for Different Natures of Dyes in the pH Range 4–7.
| nature of dyes used | minimum energy (kcal/mol) | dipole moment (D) | no. of π e– | quaternary atom (present/absent) | SIQPs PCR activity26 |
|---|---|---|---|---|---|
| (a) MB | –41.8298 | 0.0231 | 7 | yes | yes |
| (b) EB | –36.5970 | 0.0205 | 7 | yes | yes |
| (c) PB | –35.0474 | 0.0201 | 7 | yes | yes |
| (d) MC | –36.3374 | –0.2330 | 10 | yes | yes |
| (e) ER | –28.8062 | –0.2326 | 10 | yes | yes |
| (f) PC | –33.4505 | 0.0000 | 11 | yes | yes |
| (g*) HIn | 35.6056 | 0.0209 | 11 | no | phase out |
| (h*) FN | 20.8949 | 7.2629 | 10 | no | no change |
| (i*) RH | 48.4709 | 7.0520 | 10 | no | no change |