Royal Society of Chemistry, Chemical Science, 32(11), p. 8457-8468, 2020
DOI: 10.1039/d0sc03152f
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We rationalize the behaviour of protonated merocyanines in water through cross-validation of 1H NMR, UV-Vis and pH measurements, and show their capability to act as reversible photoacids along light/dark cycles can be described by a four-state model.