高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (12): 20230282.doi: 10.7503/cjcu20230282

• 研究论文: 无机化学 • 上一篇    

共价有机框架-杂多酸复合材料用于非均相催化烯烃环氧化

孔祥宇1,2, 廖力3, 卢灿忠1,2(), 方千荣3()   

  1. 1.中国科学院福建物质结构研究所, 福州 350025
    2.上海科技大学物质科学与技术学院, 上海 201210
    3.吉林大学无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2023-06-14 出版日期:2023-12-10 发布日期:2023-09-14
  • 通讯作者: 方千荣 E-mail:czlu@fjirsm.ac.cn;qrfang@jlu.edu.cn
  • 作者简介:卢灿忠, 男, 博士, 研究员, 主要从事多酸、 配位聚合物、 有机-无机复合材料、 光电转换材料等领域的研究. E-mail: czlu@fjirsm.ac.cn
  • 基金资助:
    国家重点研发计划项目(2022YFB3704900);国家自然科学基金(52073286)

Application of Covalent Organic Framework-Polyoxometalates Composites in Heterogeneous Catalytic Epoxidation of Olefins

KONG Xiangyu1,2, LIAO Li3, LU Canzhong1,2(), FANG Qianrong3()   

  1. 1.Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350025,China
    2.School of Physical Science and Technology,Shanghai Tech University,Shanghai 201210,China
    3.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun 130012,China
  • Received:2023-06-14 Online:2023-12-10 Published:2023-09-14
  • Contact: FANG Qianrong E-mail:czlu@fjirsm.ac.cn;qrfang@jlu.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2022YFB3704900);the National Natural Science Foundation of China(52073286)

摘要:

共价有机骨架是一种结晶性多孔材料, 在非均相催化方面有着巨大的应用潜力. 本文利用缺电子结构萘二酰亚胺(NDI)的衍生物作为单体, 合成了一种新型功能性共价有机框架材料COF-FL-2. COF-FL-2具有较大的孔径和良好的吸附性能, 骨架上的NDI结构能通过π-阴离子作用与杂多酸形成稳定的功能性复合材料. 通过将磷钨酸(PTA)负载在COF-FL-2上, 进一步制备了一种新型杂化杂多酸基复合物PTA@COF-FL-2. PTA@COF-FL-2对以过氧化叔丁醇(t-BuOOH)为氧化剂的烯烃环氧化反应表现出高的催化活性, 可以在温和的条件下将环辛烯和1-辛烯环氧化成相应的环氧化物. PTA@COF-FL-2具有出色的稳定性, 在反应条件下可长期使用, 使用时无PTA浸出现象. 此外, PTA@COF-FL-2回收非常方便, 可以多次循环使用.

关键词: 共价有机框架, 杂多酸, 非均相催化, 负载材料, 烯烃环氧化

Abstract:

Covalent organic frameworks are crystalline porous materials with great application potential in heterogeneous catalysis. We synthesized a new functional covalent organic framework, COF-FL-2, using derivatives of electron-deficient naphthalene diimide(NDI) as monomers. COF-FL-2 has a large pore size and good adsorption performance. The NDI structure on the skeleton can form a stable functional composite with polyoxometalates through π-anion interaction. A novel hybrid heteropolyacid complex, PTA@COF-FL-2, was prepared by loading phosphotungstic acid(PTA) on COF-FL-2. Remarkably, PTA@COF-FL-2 shows high catalytic activity for the epoxidation of olefins with t-BuOOH as the oxidant, and can epoxidate cyclooctene and 1-octene into the corresponding epoxides under mild conditions. PTA@COF-FL-2 can be used for a long time under reaction conditions, and there is no PTA leaching phenomenon when used. In addition, PTA@COF-FL-2 is very convenient to recycle and can be recycled many times.

Key words: Covalent organic framework, Polyoxometalate, Heterogeneous catalysis, Loading material, Epoxidation of alkene

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