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. Author manuscript; available in PMC: 2019 Jan 16.
Published in final edited form as: Nature. 2018 May 2;557(7703):86–91. doi: 10.1038/s41586-018-0057-7

Extended Data Fig. 3 |. Quantification of an acrylic acid analogue using 19FNMR.

Extended Data Fig. 3 |

a, 19F-NMR spectrum, showing peak assignments for the trifluoroacetic acid standard, free 2-(trifluoromethyl)acrylic acid, and 2-(trifluoromethyl)acrylic acid incorporated into the polymer. b, Diagram illustrating the experimental protocol for the quantification of 2-(trifluoromethyl)acrylic acid uptake into the crystal lattice. The concentration of the 2-(trifluoromethyl)acrylic acid in the crystal lattice (155.6 mM) is approximately the same as its concentration in the soaking solution (see Methods for details).