Abstract
Materials with red room-temperature phosphorescence (RTP) derived from sustainable resources are crucial but rarely reported. Here, we produced red RTP materials from lignin. Lignin was covalently modified with Upy (1-(6-isocyanatohexyl)-3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl) urea) to obtain Lig-Upy. The Upy in the Lig-Upy promoted the interaction between the aromatic units of lignin and reduced energy gaps of these molecules. As a result, Lig-Upy exhibited red RTP centered at 625 nm with a lifetime of 24.2 ms. Moreover, the hydrogen bonding interactions in Lig-Upy varied when embedded into different matrices, such as polyvinyl alcohol (PVA) or sodium montmorillonite (MTM), inducing a change in RTP wavelength and lifetime. Utilizing these properties, Lig-Upy was used as building blocks for producing materials exhibiting time-dependent phosphorescent colors (TDPCs). Such TDPCs materials have exhibited great potential for visual decorations, information encryption and anti-counterfeiting logos for medicine bottles.
Original language | English |
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Article number | e202421112 |
Journal | Angewandte Chemie - International Edition |
Early online date | 24 Dec 2024 |
DOIs | |
Publication status | E-pub ahead of print - 24 Dec 2024 |
Data Availability Statement
The data that support the findings of this study are available in the supplementary material of this article.Funding
This work was supported by the National Natural Science Foundation of China (32471803), Fundamental Research Funds for the Central Universities (2572022CG02) and the Open Research Fund of the School of Chemistry and Chemical Engineering, Henan Normal University (2020ZD01)
Keywords
- Lignin
- Multiple hydrogen bonds
- Red RTP materials
- TDPCs
ASJC Scopus subject areas
- Catalysis
- General Chemistry