2021 年 63 巻 1 号 p. 31-37
Molecular crystals seem rigid, fragile, and lack flexibility. However, in spite of such an appearance, this decade has witnessed flexible responses of molecular crystals, induced by external stimuli such as light, heat, humidity, mechanical force, and so on. Such molecular crystals belong to the family of soft crystals due to the flexible features and the response to gentle stimulus. This article reviews the history and recent advances of photo- and thermo-mechanical soft crystals.