LAUSR

Abstract Stimuli-responsive materials have attracted the major attention in the digital technology, sensors and biomedical applications due to their instantaneous response to the external stimuli like light, voltage, pressure, temperature, mechanical friction, and pH. Such materials are called as smart materials. In this context, the present review revolves around mechanochromic based smart materials wherein applied pressure acts as stimuli and modifies the packing mode of molecular arrangements in the materials and thereby, assist to observe the changes in their optical properties (like fluorescence and phosphorescence). Moreover, these mechanochromic materials have wide range of applications such as biosensors, damage detectors, displays, security paper and many more. Recently various molecular architectures made up of pyridine system have been well explored in the literature. Thus, the present review tried to shed light on the synthesis and mechanochromic properties of various pyridine-based molecules and their color switching behaviors in detail.