An indolizine heterocycle switches from a nonemissive to an emissive form upon protonation. The co-entrapment of this molecular switch and a photoacid generator in polymer films allows the imprinting of fluorescent patterns in the resulting materials. These operating principles permit the writing and reading of information under optical control.
Y. Zhang, J. Garcia-Amorós, B. Captain and F. M. Raymo, J. Mater. Chem. C, 2016, 4, 2744 DOI: 10.1039/C5TC03331D
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