Fig. 2: F···H interactions and molecular packing behaviors of isomeric acceptors.

a 1H and 19F NMR spectra of E-2IFC-F and Z-2IFC-F. b 1H-19F NOESY spectrum of E-2IFC-F. c Single crystals of E-2IFC-F and Z-2IFC-F. d 1D line-cut profiles of grazing-incidence wide-angle X-ray scattering (GIWAXS) and e atomic force microscopy (AFM) height images of E-2IFC-F and Z-2IFC-F.