Ferroelectric metal-organic framework with a high dielectric constant

Hydrothermal reaction of (l)-N-(4′-cyanobenzy)-(S)-proline with CdCl₂ as a Lewis acid catalyst and NaN₃ gives colorless block compound 1, in which 1 displays a complicated 3D framework. Ferroelectric and dielectric property measurements reveal that 1 exhibits physical properties comparable to that of a typical ferroelectric compound with a dipole relaxation process and a dielectric constant of ca. 38.6 that makes it, by definition, a high dielectric material.