Fig. 1: Single crystal polymerization of single-chirality AQM monomers.
From: High-fidelity topochemical polymerization in single crystals, polycrystals, and solution aggregates
a Synthetic route from chiral AQM monomers CMX to corresponding topochemical polymers CPX (X: 1-s, 1-r, 2-s, 2-r). Reaction condition i. light, heat or X-rays. b Single crystal X-ray structure of CM1-s. Atom color scheme: C (grey), N (light purple), O (orange), S (blue), F (green). H atoms are omitted for clarification. c Columnar packing of CM1-s with an AB pattern in crystals. Cyan balls represent the triflate groups for clarity. dcc: the distance between reactive methylene carbon of neighboring molecules. d Single crystal X-ray structure of CM2-s. Atom color scheme: C (grey), N (light purple), O (orange), S (blue), F (green). H atoms are omitted for clarification. e Columnar stacking of CM2-s with an AA pattern in crystals. f Schematic illustration of topochemical polymerization of AQM cores under different triggers i. The C-C bond distance was reduced to ~1.5 Å after topochemical polymerization. g Photograph and optical microscopy of CM1-s single crystals grown from chloroform. Scale bar: 40 μm. h Photograph and optical microscopy of CP1-s single crystals from the polymerization of CM1-s single crystals shown in g. Scale bar: 40 μm.
