Citation: Qiaorong RU. Synthesis and characterization of tripyridine functionalized polyionic liquid luminescent materials[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(1): 111-119. doi: 10.11862/CJIC.20250121 shu

Synthesis and characterization of tripyridine functionalized polyionic liquid luminescent materials

Qiaorong RU ^,

Henan Technical Institute, Zhengzhou 450042, China

Corresponding author: Qiaorong RU, 330628740@qq.com
Received Date: 8 April 2025
Revised Date: 6 December 2025

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A vinylimidazole-terpyridine ionic liquid monomer containing bromide ions (TerVi[Br]) was synthesized using low-toxicity ethyl acetate as the solvent. After polymerization, a hydrophobic polymeric ionic liquid (PTerVi[Tf₂N]) was subsequently obtained by introducing the bis(trifluoromethanesulfonyl)imide anion (Tf₂N^-) via ion exchange. The terpyridine group in the structure not only effectively coordinates with the rare-earth Eu³⁺ ion but also acts as an "antenna" to sensitize its luminescence, enabling the construction of high-performance rare-earth luminescent materials. The influence of the sequence of polymerization and ion exchange on the structure and properties of the materials was systematically investigated. It was found that the product obtained via the "polymerization first, then ion exchange" route (PTerVi[Tf₂N]-Eu) exhibited significantly better luminescence performance than that prepared by the "ion exchange first, then polymerization" route (P(TerVi[Tf₂N])-Eu). Specifically, PTerVi[Tf₂N]-Eu achieved a quantum yield of 20.52%, higher than the 15.70% of P(TerVi[Tf₂N])-Eu, along with a longer fluorescence lifetime of the ⁵D₀ energy level of Eu³⁺.
- rare earth,
- tripyridine,
- polymerization,
- luminescent materials
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