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. 2023 Jul 18;28(14):5474. doi: 10.3390/molecules28145474

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Upconversion properties of the annihilators. (a) Upconversion emission spectra of B-1 and B-2 in toluene, λ_ex = 635 nm (1267.5 mW/cm²); (b) CIE diagram showing the adjustable upconversion emission colors; (c) Upconversion pictures of B-1 and B-2 with PdTPBP; (d) Power-dependence of TTA-UC for PdTPBP/B-2, a slope of 1.83 (black, quadratic) and a slope of 1.09 (red, linear), I_th is 53.7 mW/cm²; (e) Upconversion lifetime decay trace of PdTPBP/B-2 at 600 nm, in deaerated toluene, PdTPBP (10 µM); (f) Stern-Volmer plots of PdTPBP in response to B-2 addition in toluene.