Circularly polarized luminescent framework materials: from synthesis to future applications

Circularly polarized luminescent (CPL) materials have attracted much attention in recent years due to their simultaneous chirality and luminescence, which have a wide range of applications in the fields of chiroptical sensors, three-dimensional optical displays, information storage, and chemical sensing. The research on CPL materials is mainly devoted to achieving a high dissymmetry factor (g_lum) with a high photoluminescence quantum efficiency (PLQY, Φ(λ)) enhancement. Studies show that framework materials are good choices to enhance both the properties. In this review, we summarize the common methods for preparing CPL-active framework materials according to different synthesis mechanisms and review the research progress of various framework materials. Furthermore, we discuss the applications of composite materials in areas such as fluorescence sensing, generating white circularly polarized light, and anti-counterfeiting over the past few years and provide a perspective on the future developments in the CPL research field.