Pressure-driven interconversion between Ruddlesden–Popper and Dion–Jacobson phases in two-dimensional hybrid perovskites via supramolecular interactions

Stereospecific cations induce nDJ and nRP structures in 2D perovskites, enabling pressure-driven RP–DJ interconversion, photoluminescence enhancement, and reversible mechanochromism via supramolecular modulation.