Red Room Temperature Phosphorescence from Lignin

Hongda Guo, Huanjie Cheng, Ruixia Liu, Xiaoxia Chen, Luyao Wang, Chenhui Yang, Shujun Li, Shouxin Liu, Jian Li, Qingjiang Pan, Tony D. James, Zhijun Chen

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article numbere202421112
JournalAngewandte Chemie - International Edition
Early online date24 Dec 2024
DOIs
Publication statusE-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

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