. 2014 Oct 28;19(11):17279–17304. doi: 10.3390/molecules191117279

Table 2.

Spin Hamiltonian parameters (hyperfine coupling constants and g-values) of the spin-adducts elucidated from simulations of the experimental EPR spectra obtained upon UVA irradiation (λ_max = 365 nm) of aerated TiO₂ P25 suspensions in water and water/dimethylsulfoxide mixed solvent (5:1 v:v) in the presence of the corresponding spin trapping agents.

Spin-Adduct	Hyperfine Coupling Constants(mT)		g-Value	Reference
Spin-Adduct	a_NO	a_i	g-Value	Reference
Water
^•DMPO–OH	1.497	a_H^β = 1.477	2.0057	[50]
^•DMPO–¹⁷OH	1.494	a_H^β = 1.480; $a_{^{17} O}$ = 0.469	2.0057	[51,57]
^•DMPO–N₃	1.481	a_H^β = 1.426; a_N = 0.314	2.0057	[50]
trans-^•EMPO–OH	1.410	a_H^β = 1.278; a_H^γ = 0.066; a_H^γ = 0.043	2.0056	[58,59]
cis-^•EMPO–OH	1.410	a_H^β = 1.542	2.0056	[58,59]
^•EMPO_degr	1.514	a_H^β = 2.187	2.0056	–
trans-^•DIPPMPO–OH	1.410	a_H^β = 1.319; a_P = 4.692	2.0055	[59,60]
cis-^•DIPPMPO–OH	1.646	a_H^β = 1.236; a_P = 3.572	2.0055	[59,60]
^•DIPPMPO_degr	1.469	a_H^β = 2.147; a_P = 4.830	2.0055	–
^•POBN–OH	1.508	a_H^β = 0.169	2.0057	[44]
^•POBN_degr	1.461	a_H^β = 1.413	2.0055	[61]
Water/DMSO (5:1 v:v)
^•DMPO–OH	1.469	a_H^β = 1.358; a_H^γ = 0.067	2.0057	[56]
^•DMPO–CH₃	1.588	a_H^β = 2.250	2.0055	[50]
^•DBNBS–CH₃	1.434	a_H(3H) = 1.331; a_H(2H^m) = 0.069; $a_{^{13} C}$ = 0.929	2.0063	[50,62]
^•DBNBS–CD₃	1.434	a_D(3D) = 0.201; a_H(2H^m) = 0.070	2.0063	[50]

Symbols β and γ denote the position of the interacting hydrogen nuclei.