高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (12): 2521.doi: 10.7503/cjcu20190401

• 物理化学 • 上一篇    下一篇

碳化聚合物点发光主体的探究

张雪,耿乙迦,陶淞源,徐抒平,徐蔚青()   

  1. 吉林大学超分子结构与材料国家重点实验室, 理论化学研究所, 化学学院, 长春 130012
  • 收稿日期:2019-07-19 出版日期:2019-12-04 发布日期:2019-12-04
  • 通讯作者: 徐蔚青 E-mail:xuwq@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(21573087);国家自然科学基金(21573092);国家自然科学基金(21873039)

Main Luminescent Centers of Carbonized Polymer Dots †

Xue ZHANG,Yijia GENG,Songyuan TAO,Shuping XU,Weiqing XU()   

  1. State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2019-07-19 Online:2019-12-04 Published:2019-12-04
  • Contact: Weiqing XU E-mail:xuwq@jlu.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21573087);the National Natural Science Foundation of China(21573092);the National Natural Science Foundation of China(21873039)

摘要:

以聚丙烯酸和乙二胺为原料, 通过水热法合成了碳化聚合物点(CPDs), 利用荧光光谱、 X射线光电子能谱和时间相关单光子计数等手段对3种不同碳化温度下形成的CPDs进行表征; 采用375 nm的紫外光对200 ℃下合成的CPDs进行光漂白, 分析了CPDs漂白前后的荧光寿命以及基团的变化, 探究了该CPDs的发光机理, 确定该CPDs具有碳核态和分子态共同控制的双发光中心.

关键词: 碳化聚合物点, 发光机理, 光漂白, 碳化

Abstract:

Polyacrylic acid and ethylenediamine were used as precursors to synthesize carbonized polymer dots(CPDs) by hydrothermal method. Fluorescence spectroscopy and time-dependent single photon counting were used to characterize the CPDs formed under different carbonization temperatures(200, 240 and 280 ℃). The luminescence mechanism of these CPDs was explored by comparing their fluorescence lifetimes and the photobleaching process under a 375 nm light. The results prove that the luminescence of these CPDs are contributed by both the carbon core state and the molecular state.

Key words: Carbonized polymer dot, Luminescence mechanism, Photobleaching, Carbonization

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