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. 2023 Jun 23;14:3765. doi: 10.1038/s41467-023-39402-8

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© The Author(s) 2023

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. 8 — a Schematic representation of the reversible, light/heat-promoted isomerization of TTA-SPDFP COF. b Photographs of Whatman 40 filter paper coated with TTA-SPDFP COF powder (5 × 5 cm²) and the images were created sequentially in the same piece of paper by irradiating through different designed masks by alternating light/heat (365 nm light for 5 s; ∆ = 60 °C). c Reversible switching cycles in absorbance at λ_max = 664 nm of TTA-SPDFP COF in response to UV light (365 nm, 5 s) and thermal heating (60 °C, 60 s). d Water adsorption-desorption isotherms for the TTA-SPDFP and TTA-MCDFP COF’s powder as a function of relative humidity.