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The stimulus‐responsive organic luminescent material is a kind of chromic material. The chromic material is regarded to be a type of material that can change its color automatically and the color can change reversibly when the material receives external stimulus. The external stimuli include light, electricity, heat, pressure, external force, acid, alkali, etc. The corresponding chromic materials are called photochromic, electrochromic, thermochromic, piezochromic, mechanochromic, acid chromic materials, etc. Fluorescent materials with stimulus response are widely used in many fields, such as biochemical analysis, anti‐counterfeiting labeling, solar cells, and so on. Although there have been many reports on controlling the luminescent properties of materials by using various stimuli, it is still a necessary subject to further study and adopt a simple and easy way to control the luminescent properties of materials.

Nowadays, many DSA derivatives have been applied in response luminescence upon external stimulus including piezofluorochromism, photochromism, thermochromism, acidichromism, multistimuli response, etc. Figures 2.1 and 2.2 show some compounds based on DSA, which exhibit excellent response luminescence upon various external stimuli.