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. Author manuscript; available in PMC: 2020 May 3.
Published in final edited form as: Science. 2019 Apr 11;364(6439):471–475. doi: 10.1126/science.aaw4675

Fig. 1. Schematic of photochemical e–/H+ charge separation (CS) and charge recombination (CR) in anthracene-phenol-pyridine triads 1 to 8.

Fig. 1

Photoexcitation of the ground state (GS) populates the local excited state (LES), which converts to the e–/H+ charge-separated state (CSS) and then back to the GS. Within the chemical structures of the LES and CSS, arrows indicate the direction of electron and proton transfers in LES→CSS (CS) and CSS→GS (CR) reactions. Circled diagrams show schematic proton potentials and lowest proton vibrational wave functions for O–H (blue) and N–H (red) bonds.