Near‐infrared Piezochromic Materials at High Pressure

Abstract

The study of piezochromic materials (PCMs) has become an attractive field and numerous scholars have reported various material structures and phenomena. PCMs incorporating near‐infrared (NIR) emission have led to a broader range of applications due to the strong penetration and interference resistance of longer wavelength light sources. However, NIR PCMs are still rare due to difficulties in tuning molecular configuration, conformation and stacking structure. In this review, organic compounds are classified according to their types and structures, and recent advances in NIR PCMs are comprehensively summarized and described. The various factors affecting the piezochromic properties from the perspective of the compound structure are shown. The effects of pressure on the photophysical changes of different compounds are discussed. It is expected to provide ideas for subsequent NIR PCMs, from structural design to predicting their photophysical properties under pressure.

1,3-diene-based AIEgens: Stereoselective synthesis and applications

“…Piezochromic materials, characterized by their luminescence color changes in response to mechanical forces, possess substantial practical implications for diverse applications. 131 , 132 These include the development of mechano-sensors, optical data storage systems, secure document technologies, and optoelectronic devices. Han et al.…”