Highest- T c 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- T c single-component organic ferroelectrics has been very scarce. Herein, we report a pair of homochiral single-component organic ferroelectrics ( R )-10-camphorsulfonylimine and ( S )-10-camphorsulfonylimine under the guidance of ferroelectric chiral chemistry. They crystallize in the chiral-polar space group P 2 1 , and their mirror image relations have been identified using vibrational circular dichroism spectra. They both exhibit 422 F 2 multiaxial ferroelectricity with T c as high as 429 K. Besides, they possess superior acoustic impedance characteristics with a value of 2.45 × 10 6 kg s -1 m -2 , lower than that of PVDF. To our knowledge, enantiomeric ( R and S )-10-camphorsulfonylimine show the highest T c 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.