Fig. 2 | Nature Communications

Fig. 2

From: Stable and ordered amide frameworks synthesised under reversible conditions which facilitate error checking

Fig. 2The alternative text for this image may have been generated using AI.

Covalent Amide Framework 2 (CAF-2). a Synthetic pathway for CAF-2 via the synthesis of polyamide(4,4′,4″,4”’-tetra(carboxyphenyl)methane-net-trans-1,4-cyclohexanediamine) (PATCnC) from 4,4′,4″,4”’-methanetetraaryltetrabenzoyl chloride and trans-1,4-cyclohexyldiamine (CHDA), followed by its devitrification. b Synchrotron PXRD patterns of PATCnC and CAF-2. c IR traces of 4,4′,4″,4‴-methanetetrayltetrabenzoic acid (MTAB) and CAF-2 which indicates the continued presence of the amide bond. The presence of the C = O stretches are indicated in the figure. d, e 15N and 13C CP MAS NMR spectra of PATCnC and CAF-2 obtained at 9.4T with the corresponding spectral assignments (Supplementary Table 1), asterisks in e denote spinning side-bands

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