PC	Photocatalyst
O-ATRP	Organocatalysed atom transfer radical polymerisation
OQP	Oxidative quenching pathway
R-X	Initiator
$I^{*}$	Initiator efficiency
Đ	Molecular weight dispersity
PC*	Excited-state PC
1,3PC*	First singlet/triplet excited-state PC
S1/T1	First singlet/triplet state
${\Phi }_{\mathrm{S}/\mathrm{T}}$	Singlet/triplet quantum yield
${\tau }_{\mathrm{S}/\mathrm{T}}$	Lifetime of first singlet/triplet excited state of PC
$k_{\mathrm{act}}$	Overall rate constant for activation
$k_{\mathrm{f}}$	Rate constant for the diffusion-controlled encounter of PC* and R-X to form an exciplex
$k_{\mathrm{d}}$	Rate constant for the dissociation of the exciplex to PC* and R-X
$K_{\mathrm{c}}$	Formation/dissociation equilibrium constant for the exciplex
$k_{\mathrm{ET}}$	Rate constant for dissociative electron transfer in the exciplex
T	Temperature
$\eta$	Viscosity of the solvent
$k_{\mathrm{B}}$	Boltzmann constant
h	Planck constant
$\Delta G^{‡}$	Gibbs free energy barrier for activation
$\Delta E^{‡}$	Electronic energy part of $\Delta G^{‡}$
$\Delta G_0$	Gibbs free energy change of electron transfer for activation
$\lambda$	Sum of the solvent reorganisation energy and the energy required to break the R-X bond
$\Delta E_{\mathrm{b}}^{\mathrm{ex}}$	Binding strength between PC* and R-X
$\Delta E_{\mathrm{de}}^{‡}$	Electronic energy barrier for deactivation
$\Delta E_{\mathrm{b}}^{\mathrm{PC-X}}$	Binding strength between PC·+ and X−
EBPA	Ethyl-$\alpha$-bromophenylacetate
TDDFT	Time-dependent density functional theory
LOSC	Localised orbital scaling correction
SMD	Density-based implicit solvation model
HOMO	Highest occupied molecular orbital
LUMO	Lowest unoccupied molecular orbital
${\psi }_{\mathrm{H}/\mathrm{L}}$	Orbital wavefunction of HOMO/LUMO
IRC	Intrinsic reaction coordinate
FLMO	Fragment-localised molecular orbital
${\tau }^{‡}$	Lifetime representation for $\Delta E^{‡}$
${\tau }_{\mathrm{b}}^{\mathrm{ex}}$	Lifetime representation for $\Delta E_{\mathrm{b}}^{\mathrm{ex}}$
${\tau }_{\mathrm{de}}^{‡}$	Lifetime representation for $\Delta E_{\mathrm{de}}^{‡}$
${\tau }_{\mathrm{b}}^{\mathrm{PC-X}}$	Lifetime representation for $\Delta E_{\mathrm{b}}^{\mathrm{PC-X}}$
MIE	Maximum initiator efficiency
AED	Activation efficiency descriptor
MCL	Minimum catalyst loading
CUD	Catalyst utilisation descriptor
MMD	Minimum molecular weight dispersity
DED	Deactivation efficiency descriptor