Regulation and application of supramolecular gel with circularly polarized luminescence

Supermolecular gel is a three-dimensional network structure assembled by small molecules or polymers in solvents through non-covalent interaction. The emergence of system complexity occurs spontaneously during the molecular self-assembly process. A multitude of chiral molecular self-assembly systems have been engineered, facilitating the achievement of circularly polarized luminescence (CPL) through the amalgamation of chiral entities with fluorophores. Hydrogen bonding, π-π stacking, and non-covalent forces, such as host-guest interactions and Van der Waals’ forces, confer upon supramolecular gels the capacity to react to diverse stimuli. Due to the flexibility of supramolecular assembly, the CPL properties of supramolecular gels have rich controllability and can be used in various applications. In this review, we summarized the examples of CPL-active supramolecular gel assembly, and further summarized the assembly environment factors and external stimuli. Furthermore, the versatility of CPL applications in supramolecular gels is demonstrated, ranging from optical devices, information encryption, biosensing and chemical sensing, and other practical applications. In conclusion, the study provides insights into the multicultural factors influencing CPL in supramolecular gels, describes their applications in various domains, and presents future perspectives in the field.