Simulation of EPR spectra of Cu2+ complexes with statistical distribution of the g-factor and hyperfine splitting

A theoretical method for EPR-spectra simulation of Cu²⁺ complexes in frozen aqueous solutions is presented. By assuming a gaussian distribution of the g_# and A_# spin-hamiltonian parameters, the method takes very satisfactorily into account both the increase in linewidth of the hyperfine lines in order of increasing m₁ and the unequal spacing betwem the lines observed in experimental spectra and arising from strain effects during freezing.