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研究论文

负载型离子液体催化生物基多元酸酯的制备

赵馨雨a,b, 韩燕楠c, 徐吉磊b,*, 安庆大a,*, 肖作毅a, 苏鑫b, 黄家辉b,*   

  1. a大连工业大学 轻工与化学工程学院 大连 116034;
    b中国科学院大连化学物理研究所 大连洁净能源国家实验室 大连 116023;
    c通辽梅花生物科技有限公司 通辽 028024
  • 投稿日期:2025-11-12
  • 通讯作者: *E-mail: anqingda@dlpu.edu.cn; xujilei@dicp.ac.cn
  • 基金资助:
    中国国家自然科学基金--青年科学基金(22308347).

Preparation of bio-based polyacid esters catalyzed by supported ionic liquids

Zhao Xinyua,b, Han Yannanc, Xu Jileib,*, An Qingdaa,*, Xiao Zuoyia, Su Xinb, Huang Jiahuib,*   

  1. aCollege of Light Industry and Chemical Engineering, Dalian Polytechnic University , Dalian, 116034 China;
    bDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    cTongliao Plum Blossom Biotechnology Co.,Ltd. Tongliao, 028024 China
  • Received:2025-11-12
  • Supported by:
    National Natural Science Foundation of China--Youth Science Fund (22308347).

本工作以弱酸性离子交换树脂为载体,以有机胺为修饰剂,通过简单的酸碱中和反应制备得到了一系列负载型离子液体催化剂,并将其应用到生物基多元酸酯的制备当中。以2,5-呋喃二甲醛(DFF)和丙二酸二甲酯(DMM)为底物,以活性最佳的Pyrrolidine-YLST-3为催化剂时,生物基多元酸酯的产率可以达到99.2%。这种制备方法极大的减少了传统氧化过程中氧气等强氧化剂的使用,安全性更高,对设备要求较低。此外,目标产物选择性较高,副产物主要为水,对环境更加友好,更加符合绿色化学原则。通过核磁共振(NMR)、红外光谱(FTIR)、X射线衍射(XRD)和X射线光电子能谱(XPS)等方法对催化剂进行了表征,发现吡咯烷与离子交换树脂之间发生了质子转移,形成了新的负载型离子液体。通过对多种底物的Knoevenagel缩合反应进行研究均取得了较高的收率,说明Pyrrolidine-YLST-3催化剂具有很强的普适性。

关键词: 生物基多元酸酯, 绿色化学, 负载型离子液体, 非均相催化, Knoevenagel缩合反应

Biomass resources, characterized by their wide distribution, carbon neutrality, and renewability, have emerged as ideal alternatives to fossil fuels. Derived from these resources, biobased platform compounds such as 5-hydroxymethylfurfural (HMF) and 2,5-diformylfuran (DFF) exhibit diverse application potential. These biobased platform compounds can be converted into high-value-added chemicals through organic chemical reactions. Bio-based polyacid esters show broad potential for applications in fields such as chemical engineering, polymer materials, and biomedicine, where they can serve as crosslinking agents, lubricants, emulsifiers, among other roles. Conventional methods for synthesizing polybasic acid esters typically involve strong oxidants, intricate processes, and demanding equipment requirements. In this study, we prepared a series of supported ionic liquid catalysts via in-situ acid-base neutralization reaction, employing weak acidic ion exchange resin as the solid support and organic amines as functional modifiers, and used them to the preparation of bio-based polyacid esters. When 2,5-diformylfuran (DFF) and Dimethyl malonate (DMM) were employed as substrates, the yield of bio-based polyacid esters can reach 99.2% in the presence of Pyrrolidine-YLST-3. The structural modifications of the resins were comprehensively characterized using multiple analytical techniques, including Elemental Analysis (EA), Nuclear Magnetic Resonance(NMR), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). These comprehensive analyses provided conclusive evidence for the successful surface modification of YLST-3 resin with pyrrolidine, revealing distinct chemical interactions between the modifier and the resin. Comprehensive characterization of both fresh and deactivated catalysts was performed using EA, FTIR, and XRD to investigate catalyst deactivation mechanisms. Successful regeneration was accomplished through a two-step protocol involving hydrogen peroxide oxidation followed by pyrrolidine re-modification, which substantially improved cycling stability. Substrate scope evaluation demonstrated that the Pyrrolidine-YLST-3 catalyst exhibited excellent activity in Knoevenagel condensation reactions across diverse substrates, confirming its broad applicability.

Key words: bio-based polyacid ester, Green Chemistry, supported ionic liquids, heterogeneous catalysis, Knoevenagel condensation reaction