Fig. 1: Synthesis and structure of COFs. | Nature Communications

Fig. 1: Synthesis and structure of COFs.

From: Charging modulation of the pyridine nitrogen of covalent organic frameworks for promoting oxygen reduction reaction

Fig. 1: Synthesis and structure of COFs.

a Chemical structure of PY-BPY-COF, ions-PY-BPY-COF, and im-PY-BPY-COF; b Proposed mechanisms for the imidazopyridine bond formation from the BPY units; PXRD patterns for c PY-BPY-COF; d ion-PY-BPY-COF; and e im-PY-BPY-COF, the experimentally observed (black), Pawley refined (red) and their difference (pink), simulated using the AA (blue), staggered AB (green) stacking modes and Bragger position (orange).

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