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
ΔrG	Gibbs free energy
σ	Hammett sigma constants
F	field/inductive effect
R	resonance effect