Two-Dimensional Organoferroelasticity in a Single Crystal of 4-lodoaniline

A ferroic property such as ferroelasticity in an organic molecular crystal is a lucrative and crucial area to explore and investigate, owing to its potentiality in developing mechanical materials. Direction-dependent mechanical deformations are probable in organic compounds; however, isotropic deformation seems improbable due to their anisotropic structural nature. In this work, we report two-dimensional ferroelasticity in 4-iodoaniline undergoing deformation on two mutually orthogonal planes on the application of external stress, which was investigated by force measurement and single-crystal X-ray diffraction techniques at macroscopic and microscopic levels.