高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (1): 20250325.doi: 10.7503/cjcu20250325

• 研究论文 • 上一篇    下一篇

前驱体平均官能度和交联增强发射效应对碳化聚合物点固态发光性能的影响

李睿, 刘君君, 陶淞源, 朱志承, 杨柏()   

  1. 吉林大学化学学院,超分子结构与材料全国重点实验室,长春 130012
  • 收稿日期:2025-10-31 出版日期:2026-01-10 发布日期:2025-12-06
  • 通讯作者: 杨柏 E-mail:byangchem@jlu.edu.cn
  • 基金资助:
    吉林省自然科学基金(批准号: ***202402011)资助

Influence of Average Functionality of Precursors and Crosslink-enhanced Emission Effect on Solid-state Luminescence Performance of Carbonized Polymer Dots

LI Rui, LIU Junjun, TAO Songyuan, ZHU Zhicheng, YANG Bai()   

  1. State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2025-10-31 Online:2026-01-10 Published:2025-12-06
  • Contact: YANG Bai E-mail:byangchem@jlu.edu.cn
  • Supported by:
    the Natural Science Foundation of Jilin Province, China(No.***202402011)

摘要:

碳化聚合物点(CPDs)作为碳点的重要分支, 因其独特的亚荧光基团与类聚合物结构, 在固态发光材料领域展现出优异的性能及加工成型优势. CPDs外壳中的亚荧光基团因聚合物组分的存在避免了π-π相互作用的产生, 从而有效缓解了聚集导致的猝灭现象. 因此, CPDs是一种理想且具有发展潜力的高效固态发光材料. 为实现CPDs的高效固态发光, 本文以线性聚丙烯酸与不同官能度的有机小分子作为共同前驱体制备了系列CPDs. CPDs外层的聚合物分子链对荧光中心起到了隔离和分散作用, 有效抑制了聚集诱导猝灭效应, 保障了固态发光性能. 基于交联增强发射机理, 系统研究了前驱体平均官能度对CPDs发光性能的影响. 结果表明, 随着前驱体官能度和交联度的增加, CPDs的荧光量子产率和室温磷光寿命显著提升, 实现了对固态发光性能的有效增强.

关键词: 碳化聚合物点, 碳点, 固态发光, 交联增强发射效应, 前驱体官能度

Abstract:

Carbonized polymer dots(CPDs), as an important branch of carbon dots, have demonstrated remarkable performance and processing and molding advantages in the field of solid-state luminescent materials due to their unique sub-fluorescent groups and polymer-like structures. Specifically, the sub-fluorescent groups in the shell of CPDs avoid the generation of π-π interactions due to the presence of polymer components, thereby effectively suppressing the quenching caused by aggregation. Therefore, CPDs are ideal and highly efficient solid-state luminescent materials with development potential. To achieve efficient solid-state luminescence of CPDs, a series of CPDs was prepared using linear polyacrylic acid and organic small molecules of different functionalities as co-precursors through a hydrothermal process. The polymer molecular chain on the outer layer of CPDs isolates and disperses the fluorescence center, effectively suppressing the aggregation-caused quenching effect and ensuring the solid-state luminescence performance. Based on the crosslink-enhanced emission effect, the influence of the average functionality of co-precursors on the luminescence performance of CPDs was systematically studied. The results show that with the increase of the functionality and crosslinking degree of the precursors, the fluorescence quantum yield and

room-temperature phosphorescence lifetime of CPDs are significantly enhanced, effectively improving the solid-state luminescence performance.

Key words: Carbonized polymer dots, Carbon dots, Solid-state luminescence, Crosslink-enhanced emission effect, Functionality of precursor

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