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. 2022 Jan 17;13:347. doi: 10.1038/s41467-022-28011-6

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© The Author(s) 2022

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. 4 — a The fluorescence/phosphorescence spectra of DPP-BOH-PVA and the UV–vis absorption spectra of fluorescein and rhodamine B. b The normalized RTP spectra of DPP-BOH-PVA-F and DPP-BOH-PVA-R. c Time-resolved emission-decay profiles of DPP-BOH-PVA-F (@ 533 nm) and DPP-BOH-PVA-R (@ 581 nm). d Simplified Jablonski diagram to explain the phosphorescence energy transfer (ISC = intersystem crossing, RTP = room-temperature phosphorescence). e RTP photographs of DPP-BOH-PVA, DPP-BOH-PVA-F, and DPP-BOH-PVA-R before and after heating at 90 °C for 15 min. f Commission Internationale de l’Eclairage (CIE) coordinates of afterglow emissions for DPP-BOH-PVA, DPP-BOH-PVA-F, and DPP-BOH-PVA-R.