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. 2021 Oct 21;12:6119. doi: 10.1038/s41467-021-26385-7

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© The Author(s) 2021

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. 1 — a Chemical structure and synthesis of D(C₇CO)-BTBT from the BTBT π-core via Friedel-Crafts acylation reaction in ambient. b Photos taken during the ambient reaction and the simple work-up (filtering and washing with water/methanol/dichloromethane), and the photo of the gram-scale solid obtained after drying. c Chemical structure of C₈-BTBT, experimental HOMO/LUMO energy levels of C₈-BTBT and D(C₇CO)-BTBT determined via electrochemical methods combined with the optical band gaps (E_g’s)²⁶, and the DFT(B3LYP/6-31 G**)-calculated topographical frontier orbital representations.