聚酰亚胺
共价键
无定形固体
材料科学
限制
热稳定性
共价有机骨架
化学工程
聚合物
纳米技术
分子
高分子化学
多孔性
化学
有机化学
复合材料
图层(电子)
工程类
机械工程
作者
Qianrong Fang,Zhongbin Zhuang,Shuang Gu,Robert B. Kaspar,Jie Zheng,Junhua Wang,Shilun Qiu,Yushan Yan
摘要
Covalent organic frameworks (COFs) are an emerging class of porous crystalline polymers with a wide variety of applications. They are currently synthesized through only a few chemical reactions, limiting the access and exploitation of new structures and properties. Here we report that the imidization reaction can be used to prepare a series of polyimide (PI) COFs with pore size as large as 42 × 53 Å2, which is among the largest reported to date, and surface area as high as 2,346 m2 g−1, which exceeds that of all amorphous porous PIs and is among the highest reported for two-dimensional COFs. These PI COFs are thermally stable up to 530 °C. We also assemble a large dye molecule into a COF that shows sensitive temperature-dependent luminescent properties. Covalent organic frameworks are a potentially useful class of materials, although they are currently synthesized using relatively few reactions. Here, the authors show that the imidization reaction can be used to prepare a series of large pore polyimide frameworks with high surface area and thermal stability.
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