Highest- single-component homochiral organic ferroelectrics.

Organic single-component ferroelectrics with low molecular mass have drawn great attention for application in organic electronics. However, the discovery of high- single-component organic ferroelectrics has been very scarce. Herein, we report a pair of homochiral single-component organic ferroelectrics ()-10-camphorsulfonylimine and ()-10-camphorsulfonylimine under the guidance of ferroelectric chiral chemistry. They crystallize in the chiral-polar space group 2, and their mirror image relations have been identified using vibrational circular dichroism spectra. They both exhibit 4222 multiaxial ferroelectricity with as high as 429 K. Besides, they possess superior acoustic impedance characteristics with a value of 2.45 × 10 kg s m, lower than that of PVDF. To our knowledge, enantiomeric ( and )-10-camphorsulfonylimine show the highest among the known organic single-component ferroelectrics and low acoustic impedance well matching with that of bodily tissues. This work promotes the development of high-performance organic single-component ferroelectrics and is of great inspiration to explore their application in next-generation flexible smart devices.