| DFT | Density Functional Theory |
| HAT | Hydrogen Atom Transfer |
| SPLET | Sequential Proton Loss Electron Transfer |
| SET-PT | Single Electron Transfer Followed by Proton Transfer |
| ArOH | Flavonoid |
| BDE | Bond Dissociation Enthalpy |
| IP | Ionization Potential |
| PDE | Proton Dissociation Enthalpy |
| PA | Proton Affinity |
| ETE | Electron Transfer Enthalpy |
| σ | Hammett sigma constants |
| F | field/inductive effect |
| R | resonance effect |
| P | Pearson correlation coefficient |