Low-Temperature Luminescence of Poly(diphenylene phthalide)

The UV irradiation of poly(diphenylene phthalide) results in a set of ion–radical states and their stabilization by a polymer matrix. The authors record the thermally stimulated cryoluminescence (T = 80–150 K) of poly(diphenylene phthalide) caused by the recombination of ion–radical states. It is shown that the kinetics of the decay of poly(diphenylene phthalide)’s cryoluminescence is polychronous.