Pore surface engineering in covalent organic frameworks

Atsushi Nagai, Zhaoqi Guo, Xiao Feng, Shangbin Jin, Xiong Chen, Xuesong Ding and Donglin Jiang ()
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Atsushi Nagai: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Zhaoqi Guo: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Xiao Feng: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Shangbin Jin: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Xiong Chen: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Xuesong Ding: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.
Donglin Jiang: Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Okazaki 444-8787, Japan.

Nature Communications, 2011, vol. 2, issue 1, 1-8

Abstract: Abstract Covalent organic frameworks (COFs) are a class of important porous materials that allow atomically precise integration of building blocks to achieve pre-designable pore size and geometry; however, pore surface engineering in COFs remains challenging. Here we introduce pore surface engineering to COF chemistry, which allows the controlled functionalization of COF pore walls with organic groups. This functionalization is made possible by the use of azide-appended building blocks for the synthesis of COFs with walls to which a designable content of azide units is anchored. The azide units can then undergo a quantitative click reaction with alkynes to produce pore surfaces with desired groups and preferred densities. The diversity of click reactions performed shows that the protocol is compatible with the development of various specific surfaces in COFs. Therefore, this methodology constitutes a step in the pore surface engineering of COFs to realize pre-designed compositions, components and functions.

Date: 2011
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DOI: 10.1038/ncomms1542

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