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. 2021 Mar 9;26(5):1475. doi: 10.3390/molecules26051475

Figure 9.

Figure 9

Demonstrating stepwise and concerted ESDPT in 7-AI (adapted from reference [114]). Here N is the dimer, S is the intermediate molecule resulting from single proton transfer and D is the tautomer resulting from ESDPT. Reprinted with permission from (Crespo-Otero, R.; Kungwan, N.; Barbatti, M. Stepwise Double Excited-State Proton Transfer Is Not Possible in 7-Azaindole Dimer. Chem. Sci. 2015, 6, 5762–5767). Published by The Royal Society of Chemistry.