Muon spin relaxation study of spin dynamics in poly(triarylamine)

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“…The first point relates to the broadness of the Avoided Level Crossing (ALC) resonances for which it is commented that there should not be narrow 1 ALC resonances due to cyclohexadienyl type radicals in a polymer below Tg due to a distribution of dihedral angles with neighbouring phenyl rings. As stated in the original manuscript [1] the ALCs are indeed broad for various reasons and the consequence of this is that not all resonances can be resolved individually. Indeed, one of the reasons is that mentioned by McKenzie et al It is worth noting that one possible way to take into consideration the broadening resulting from distribution of dihedral angles with neighbouring phenyl rings may be to employ in the model a distribution such as a Gaussian to represent the distribution of angles.…”