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. 2017 Dec 27;4(6):061508. doi: 10.1063/1.4996505

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© 2017 Author(s).

2329-7778/2017/4(6)/061508/38

All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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FIG. 15. — (a) The molecular assembly used to accumulate two electrons in the central anthraquinone (AQ) in a light-driven process. The electron and proton transfer steps are indicated. (b) Verification of the quadratic power dependence of the doubly reduced state AQ^2–. To that end, the amplitude of an IR band indicative of the doubly reduced state AQ²⁻ at 1366 cm⁻¹ is plotted against the bleach signal of AQ at 1322 cm⁻¹. (c) Electron pathway of the doubly reduced state in an energy level scheme, with the time-scales of various electron and proton transfer steps indicated. The pathway with a single excitation leading to the singly reduced state is omitted for clarity. Adapted from Refs. ¹⁵ and ¹⁶.