An elastic organic crystal with piezochromic luminescent behavior

Organic crystals have become ideal candidates as smart materials due to their flexibility and responsive characteristics[1].Among them,organic crystals with piezochromic behavior demonstrate alterations in color under external pressure.They are capable of serving as pressure sensing and optical recording systems,enabling real-time visual repre-sentation of pressure responses,and thus have attracted significant in-terest from researchers[2].However,conventional organic single crystals with piezochromic behavior typically exhibit weak luminescence under external pressure,which is attributed to pressure-induced increase ofπ-πstacking interactions,thus leading to non-radiative decay[3].