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Transient generated by irradiation with UV-light (λ = 355 nm) for the type-II azophenol 12 in ethanol (left) and changes in the electronic spectrum of a 12 cis-to-trans isomerising toluene solution at 298 K (Δt = 120 s, [12] = 20 μM). From [59] – Reproduced by permission of the PCCP Owner Societies.
