Single Solution‐Phase Synthesis of Charged Covalent Organic Framework Nanosheets with High Volume Yield
Single Solution‐Phase Synthesis of Charged Covalent Organic Framework Nanosheets with High Volume Yield
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单溶液相合成高产量带电共价有机框架纳米片
DOI：
10.1002/ange.202209306
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发表时间：
2022
影响因子：
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通讯作者：
Zhongyi Jiang
中科院分区：
文献类型：
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作者：
Tong Huang;Haifei Jiang;John C. Douglin;Yu Chen;Shuoyao Yin;Junfeng Zhang;Xiaojuan Deng;Hong Wu;Yan Yin;Dario R. Dekel;Michael D. Guiver;Zhongyi Jiang
共价有机框架纳米片（COF-NS）是功能材料的新兴构建块，并且它们的可扩展制造是非常可取的。目前的合成方法由于受限的表面/界面生长空间和复杂的多相合成系统而导致体积产率低。在本文中，我们报告了使用单相有机溶液系统在开放空间中合成带电COF-NS，实现了高达18.7 mg mL−1的更高体积产率。 电荷诱导的静电排斥力使得从初始离散和无序聚合物到大的结晶COF-NS的面内各向异性二次生长成为可能。带电的COF-NS胶体悬浮液被浇铸成具有层状形态和定向结晶的薄而紧凑的质子交换膜（PEM），显示出出色的质子传导性、可忽略的尺寸溶胀和良好的H2/O2燃料电池性能。
Covalent organic framework nanosheets (COF‐NSs) are emerging building blocks for functional materials, and their scalable fabrication is highly desirable. Current synthetic methods suffer from low volume yields resulting from confined on‐surface/at‐interface growth space and complex multiple‐phase synthesis systems. Herein, we report the synthesis of charged COF‐NSs in open space using a single‐phase organic solution system, achieving magnitudes higher volume yields of up to 18.7 mg mL−1. Charge‐induced electrostatic repulsion forces enable in‐plane anisotropic secondary growth from initial discrete and disordered polymers into large and crystalline COF‐NSs. The charged COF‐NS colloidal suspensions are cast into thin and compact proton exchange membranes (PEMs) with lamellar morphology and oriented crystallinity, displaying outstanding proton conductivity, negligible dimensional swelling, and good H2/O2fuel cell performance.