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. 2019 Oct 1;10:4449. doi: 10.1038/s41467-019-12463-4

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Molecular motor properties of 1. a Schematic representation of the geometry of A. b Four-step process of the motor motion and associated fluorescence changes. c Individual steps of motor operation followed by ¹H NMR spectroscopy, (1) B in cyclohexane-d₁₂, (2) after 520 nm irradiation, (3) D in acetonitrile-d₃/D₂O (8/2), (4) after heating to 27 °C, (5) A in cyclohexane-d₁₂, (6) after 520 nm irradiation, (7) C in acetonitrile-d₃/D₂O (8/2), (8) after heating to 60 °C. d One full cycle of motor operation followed by ¹H NMR spectroscopy, (1) B in cyclohexane-d₁₂, (2) after 520 nm irradiation, (3) after solvent change to acetonitrile-d₃/D₂O (8/2), (4) after heating to 60 °C, (5) after solvent change to cyclohexane-d₁₂, (6) after irradiation with 520 nm, (7) after solvent change to acetonitrile-d₃/D₂O (8/2), (8) after heating to 60 °C, (9) after solvent change to cyclohexane-d₁₂. e Individual steps of autonomous motor operation followed by ¹H NMR spectroscopy in 12DCB-d₄, (1) pure B, (2) after 520 nm irradiation, (3) pure D, (4) after heating to 130 °C, (5) pure A, (6) after 520 nm irradiation, (7) pure C, (8) after heating to 130 °C. f Positional changes of the methyl group with respect to the static thioindigo fragment during one full cycle of directional motion