Journal of Radiation Research and Radiation Processing ›› 2020, Vol. 38 ›› Issue (5): 73-78.doi: 10.11889/j.1000-3436.2020.rrj.38.051001

• RESEARCH HIGHLIGHT • Previous Articles    

Rapid synthesis of covalent organic frameworks at room temperature through electron beam irradiation

ZHANG Mingxing1,2,3(),CHEN Junchang1,ZHANG Shitong1,ZHOU Xiaoqi4,HE Linwei1,Matthew V. Sheridan1,YUAN Mengjia1,ZHANG Maojiang2,CHEN Long1,DAI Xing1,MA Fuyin1,WANG Jingdong1,HU Jiangtao2,WU Guozhong2,KONG Xueqian4,ZHOU Ruhong1,Thomas E. Albrecht-Schmitt5,CHAI Zhifang1,WANG Shuao1()   

  1. 1.State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), and Collaborative Innovation Center of Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
    2.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    3.University of Chinese Academy of Sciences, Beijing 100049, China
    4.Department of Chemistry, Zhejiang University, Hangzhou 310027, China
    5.Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
  • Received:2020-07-22 Revised:2020-08-24 Accepted:2020-08-24 Online:2020-10-20 Published:2020-10-19
  • Contact: WANG Shuao E-mail:zhangmx10@lzu.edu.cn;shuaowang@suda.edu.cn
  • About author:ZHANG Mingxing (male) was born in 1990, and obtained his master’s degree from University of Chinese Academy of Sciences in June 2017. Now he is a graduate student at University of Chinese Academy of Sciences, focusing on synthesis of functional materials by radiation method. E-mail: zhangmx10@lzu.edu.cn.
  • Supported by:
    National Natural Science Foundation of China(21825601);a General Financial Grant from the China Postdoctoral Science Foundation(2019M651802)

Abstract:

The conventional solvothermal/hydrothermal reaction method is still a mainstream approach for synthesis of crystalline porous materials such as covalent organic frameworks (COFs). Their synthesis methods often require increased temperatures, closed systems with high pressures, and long reaction times. The provision of a mild and efficient energy input system for rapid synthesis of COFs is still challenging. We present a rapid room-temperature synthesis of two-dimensional imine-linked COFs through simple electron beam irradiation. Radiation energy is used as a new energy input mode instead of the conventional heating energy for the COF synthesis. Such synthesis by electron beam irradiation can be achieved at room temperature within minutes. In addition, the process can be adapted for large-scale production. The absorbed dose has crucial effects on the properties of the synthesized COFs, such as the crystallinity, Brunauer-Emmett-Teller surface area, morphology, and thermal stability. A series of successful syntheses of COFs, including not only the known rigid COFs, but also a series of new flexible COFs, demonstrates the generality of this approach.

Key words: Crystalline porous materials, Covalent organic frameworks, Electron beam, Radiation synthesis

CLC Number: 

  • TL13