摘要：As an emerging class of crystalline porous materials, covalent organic frameworks（COFs） have been wid.ly used.as catalysts or catalyst supports. Flexible regulation of the pores and.easy introd.ction 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 coord.nation complex of manganese（Ⅱ） bipyrid.ne complexes（[Mn（bpy）2]2＋）, via a simple ion exchange process. The resulting I-COFs can act as effective heterogeneous catalysts for epoxid.tion 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 d.fferent applications.