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Three-Dimensional Anionic Cyclodextrin-Based Covalent Organic Frameworks
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DOI：10.1002/anie.201710633.png)
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摘要
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Three-dimensional covalent organic frameworks (3D COFs) are promising crystalline materials with well-defined structures, high porosity, and low density; however, the limited choice of building blocks and synthetic difficulties have hampered their development. Herein, we used a flexible and aliphatic macrocycle, namely g-cyclodextrin (g-CD), as the soft struts for the construction of a polymeric and periodic 3D extended network, with the units joined via tetrakis(spiroborate) tetrahedra with various counterions. The inclusion of pliable moieties in the robust open framework endows these CD-COFs with dynamic features, leading to a prominent Li ion conductivity of up to 2.7 mS cm(-1) at 30 degrees C and excellent long-term Li ion stripping/plating stability. Exchanging the counterions within the pores can effectively modulate the interactions between the CD-COF and CO2 molecules.
Keyword:
covalent organic frameworks
cyclodextrin
ionic structures
microporous materials
three-dimensional structures
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16.9
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6.3W
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56.7W
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