Journal
MACROMOLECULAR RESEARCH
Volume 24, Issue 4, Pages 366-370Publisher
POLYMER SOC KOREA
DOI: 10.1007/s13233-016-4039-z
Keywords
covalent organic frameworks; dynamic covalent chemistry; morphology control; solvothermal synthesis
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Funding
- National Natural Science Foundation of China [20974069, 21174089]
- State Key Laboratory of Molecular Engineering of Polymers (Fudan University) [K2013-23]
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The past decades have witnessed significant advance in the synthesis of covalent organic frameworks (COFs), however, their formation and morphology revolution mechanism have been rarely reported. Here, through an acid modulated dynamic covalent chemistry approach, pure and uniform micro-octahedral covalent imine frameworks were obtained for the first time. Formation mechanism based on the stacking of initially formed two-dimensional nanoplates followed by surface smoothing enabled by the dynamic nature of imine bonding was proposed. Furthermore, we revealed for the first time that nonstoichiometric method can be applied to the synthesis of covalent organic frameworks. Thus we provide novel strategy for the morphology control COFs which will surely facilitate their application in energy-related area.
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