ROS	Reactive Oxygen Species
•O2−	Superoxide anion radical
H2O2	Hydrogen peroxide
1O2	Singlet oxygen
•OH	Hydroxyl radical
H2O2+	Protonated hydrogen peroxide
H2O2−	Deprotonated hydrogen peroxide
OH−	Hydroxide ion
H+	Hydrogen ion or proton
H2O	Water
HO2−	Perhydroxide ion
•O2H	Hydroperoxyl radical
e−	Electron
h+	Hole
T	Triplet state
S	Singlet state
D	Doublet state
G°, E°	Standard Gibbs free energy and total energy
ΔG	Change in Gibbs Free Energy
ΔE	Change in Energy
ΔG0	Standard change in Gibbs Free Energy
dO-O, dO-H	Bond distances between O atoms and between O and H atoms
νO-O, νO-H	Vibrational frequencies of O-O and O-H bonds
μ	Dipole moment
R2	Electronic spatial extent
ZPE	Zero-Point Energy
B3LYP	Becke, 3-parameter, Lee-Yang-Parr
SCF	Self-Consistent Field
PCM	Polarizable Continuum Model
MP2	Moller-Pleset 2