Triplet life times of haloanthracenes obtained from best fit simulations of ESE EPR detected triplet kinetics, as exemplary shown in Fig 4.

For the full set of decay curves and their simulations, cf. S1, S2, S3 and S4 Figs. Since in the case of 3, the signals of the canonical X and Y direction can not be distinguished spectrally, the mutual triplet life times are given in the X column. For 1, the triplet life time has been determined in a separate measurement (cf. S5 Fig), in good agreement to the value found in the literature [29] (≈ 40 ms), and was held constant. In the cases of 1 and 2 no triplet decay anisotropy was found, meaning that kX = kY = kZ = k. The numbers in braces indicate the width of the distributions of the parameters, described in terms of 2σ of corresponding normal distributions, as obtained from Monte Carlo simulations.