Heteroaromatic Azo-activated Nucleophilic Substitutions. The Reaction of 4-(p-Methoxyphenylazo)pyridinium Methiodide with Piperidine in Dimethyl Sulphoxide
The novel photoswitchable bis-azo derivative reported herein shows a high temporal resolution of 2 × 108times between the thermal relaxation rates of its two constituting photochromes.