Ionic liquid as a green solvent for ionothermal synthesis of 2D keto-enamine-linked covalent organic frameworks

Covalent organic frameworks (COFs) are usually synthesized under solvothermal conditions in a mixture of high-boiling organic solvents in a sealed system. By using a room temperature ionic liquid (IL) as a solvent, we presented the preparation of two-dimensional (2D) keto-enamine-linked COFs in an o...

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Bibliographic Details
Published inMaterials chemistry and physics Vol. 226; pp. 244 - 249
Main Authors Dong, Bin, Wang, Wen-Jing, Pan, Wei, Kang, Guo-Jun
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 15.03.2019
Elsevier BV
Subjects
Covalent organic frameworks
Ionic liquids
Ionothermal synthesis
Ions
Open channels
Porosity
Pressure
Solvents
Synthesis
Covalent organic frameworks
Ionic liquids
Porosity
Ionothermal synthesis
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Summary:Covalent organic frameworks (COFs) are usually synthesized under solvothermal conditions in a mixture of high-boiling organic solvents in a sealed system. By using a room temperature ionic liquid (IL) as a solvent, we presented the preparation of two-dimensional (2D) keto-enamine-linked COFs in an open container at ambient pressure. The as-synthesized 2D keto-enamine-linked COFs have ordered open channels and so the IL can be completely removed from the pores to provide the sole formation of crystalline 2D COFs. Not only the imidazolium-based IL acted as both solvent and catalyst, it was also recycled for further use without activity loss. [Display omitted] •A room temperature IL was used as a green solvent to synthesize 2D COFs.•The ionothermally synthetic process took place in an open container at ambient pressure.•The IL can be totally removed from the pores to provide the sole formation of 2D COFs.•The IL was recycled for further use without activity loss.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2019.01.032