“…Mechanically responsive smart materials that can convert chemical energy into mechanical movement have been attracting considerable interest in a wide range of advanced applications such as robotics, actuators, and sensors. [1][2][3][4][5][6][7][8] This energy transformation can be achieved by the reversible deformation of materials (e.g., contraction, expansion, rotation, bending, twisting, and curling) under external stimuli such as electrical fields, temperature, light, pH, vapor, and pressure. [9][10][11][12] At present, most mechanically responsive materials are based on polymeric materials, including organic polymers, hydrogels, and liquid crystal elastomers, [13][14][15][16][17] while relatively less focus has been put on molecular crystals that possess precisely determined structures with ordered molecular packing.…”