Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2025, Vol. 61 ›› Issue (5): 853-859.DOI: 10.13209/j.0479-8023.2025.069

Previous Articles     Next Articles

Hydrophobic Modification and Spectroscopic Characterization of Citric Acid–Phenylenediamine-Derived Carbon Quantum Dots

WANG Yali1,†, WANG Yongchao1, XIE Guozhen2, CAO Jintao1, WANG Chenghu1, WANG Shaojie1, HAO Fenglian1, BAI Longlong1
  

  1. 1. School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000 2. Shaanxi Yuneng Fine Chemical Materials Co., Ltd., Yulin 719000
  • Received:2024-05-20 Revised:2025-05-27 Online:2025-09-20 Published:2025-09-20
  • Contact: WANG Yali, E-mail: yaw32(at)yulinu.edu.cn

苯二胺与柠檬酸碳量子点的疏水改性及光谱研究

王亚俐1,†, 王永超1, 谢国桢2, 曹锦涛1, 王成虎1, 王少杰1, 郝凤莲1, 白龙龙1   

  1. 1. 榆林学院化学与化工学院, 榆林 719000 2. 陕西榆能精细化工材料有限公司, 榆林 719000
  • 通讯作者: 王亚俐, E-mail: yaw32(at)yulinu.edu.cn
  • 基金资助:
    中国科学院洁净能源创新研究院–榆林学院联合基金(YLUDNL2022009)、陕西省高层次引进人才项目(2022TZRC01)、秦创园高层次引进人才项目(QCYRCXM-2023-055)和榆林学院高层次引进人才项目(2023GK03)资助

Abstract:

Citric acid was used as the carbon source, and three phenylenediamine isomers — o-phenylenediamine, m-phenylenediamine, and p-phenylenediamine — served as nitrogen sources to synthesize carbon quantum dots (CQDs) via a hydrothermal method. The resulting CQDs exhibited distinct colors: orange-yellow (o-phenylenediamine), light yellow (m-phenylenediamine), and purple (p-phenylenediamine). The CQDs were subsequently modified with oleylamine to introduce hydrophobic surface properties. Structural and optical properties before and after modification were characterized using Fourier transform infrared spectroscopy (FT-IR), fluorescence spectroscopy (FS), and ultraviolet-visible spectroscopy (UV-vis). The results indicate that the CQDs derived from m-phenylenediamine showed the most enhanced hydrophobicity after oleylamine modification, with significantly improved solubility in toluene, which is attributed to strengthened hydrocarbon interactions.

Key words: citric acid–phenylenediamine-derived CQDs, oleylamine modification, spectroscopic characterization

摘要:

以柠檬酸为碳源, 分别以邻苯二胺、间苯二胺和对苯二胺为氮源, 采用水热法合成3种碳量子点(CQDs), 颜色分别为橘黄色(邻苯二胺)、淡黄色(间苯二胺)及香芋紫(对苯二胺)。随后, 通过油胺对CQDs表面进行疏水改性, 制得疏水性CQDs。利用傅里叶变换红外光谱(FT-IR)、荧光光谱和紫外可见光谱(UV-vis)等手段, 对改性前后的CQDs进行结构与性能表征。结果表明, 间苯二胺衍生的CQDs经油胺改性后, 其碳氢结构增强, 表现出最优的甲苯溶解性。

关键词: 柠檬酸–苯二胺碳量子点(CQDs), 油胺改性, 光谱表征