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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