Materials Chemistry

Reacting into new frameworks

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Science  23 Dec 2016:
Vol. 354, Issue 6319, pp. 1547-1548
DOI: 10.1126/science.354.6319.1547-d

Covalent organic frameworks (COFs) are formed through moderately strong bonds between multidentate centers and organic linkers. One difficulty in using very strong linkages to create more robust materials is that the process of crystallization must allow for error correction, so the linkages must be weak enough to be reversible. Waller et al. bypassed this problem by converting the imine linkages in two COFs into stronger amide linkages, using mild oxidizing conditions. Both materials retained their crystallinity and porosity and displayed much greater stability; they were stable after 24 hours in 12 M hydrochloric acid, as well as 1 M sodium hydroxide.

J. Am. Chem. Soc. 10.1021/jacs.6b08377 (2016).

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