Fig. 1: Model compounds and 2D PAVs by Mannich-elimination reaction.
From: Towards single-crystalline two-dimensional poly(arylene vinylene) covalent organic frameworks
a, Schematic synthesis of model compound 3. (i) Cs2CO3, DMAc/H2O (10/1), 120 °C, 8 h. b, Proposed reaction mechanism for the Mannich-elimination pathway. c, In situ NMR analysis of model reaction performed in DMAc. The spectra of compounds 1, 2 and 4 measured in DMSO-d6 are shown for comparison. The in situ spectra are recorded in DMAc with trace DMSO-d6 for calibration. d, Schematic synthesis of 2DPAV-BTT-P(F) and 2DPAV-TPB-P(F) from the F-labelled 2D PIs. (ii) Cs2CO3, DMAc/H2O (7/3), 120 °C, 5–6 days. e,f, Time-dependent solid-state 13C CP NMR (e) and FT-IR (f) spectra during the synthesis of 2DPAV-BTT-P(F) (lines for 6 days) from 2DPI-BTT-P(F) (lines for 0 days).
