predominated at long-wave UV wavelengths. These isomers interconvert photochemically in dmso in a bidirectional linkage isomerism process that could be cycled at least five times over a period of >250 h without evidence of photodecomposition. Instances of photoswitches with photochemically driven forward and reverse processes such as this are relatively uncommon and lead to promising applications, e.g., in erasable information storage.
Chen et al. (2026) studied this question.