Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (9): 1437-1444.DOI: 10.1016/S1872-2067(18)63065-7

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Ionic covalent organic frameworks for highly effective catalysis

Hui Hua, Qianqian Yana, Ming Wanga, Li Yub, Wei Panc, Baoshan Wange, Yanan Gaoa   

  1. a Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, Hainan, China;
    b Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, Shandong, China;
    c College of Chemistry, Chemical Engineering and Materials Science Engineering, Shandong Normal University, Jinan 250014, Shandong, China;
    d College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China
  • Received:2018-02-15 Revised:2018-03-23 Online:2018-09-18 Published:2018-07-19
  • Contact: 10.1016/S1872-2067(18)63065-7
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21473196, 21676264), the 100-Talents Program of CAS, and the State Key Laboratory of Fine Chemicals, Dalian University of Technology (KF1415).

Abstract:

As an emerging class of crystalline porous materials, covalent organic frameworks (COFs) have been widely used as catalysts or catalyst supports. Flexible regulation of the pores and easy introduction of functional active sites onto the skeleton of COFs make them promising platforms for many catalysis applications. However, only a single function is generally observed in these COFs. Herein, we synthesized a negatively charged ionic COF (I-COF) and successfully incorporated functionalized counter ions, that is, metallic Mn2+ and a coordination complex of manganese(Ⅱ) bipyridine complexes ([Mn(bpy)2]2+), via a simple ion exchange process. The resulting I-COFs can act as effective heterogeneous catalysts for epoxidation reactions. We envisage that with this type of ionic architecture, a variety of other functional cations could be exchanged into the frameworks, thus making the COF a versatile platform for different applications.

Key words: Covalent organic framework, Ionic architecture, Catalyst, Epoxidation, Porous material