Adjusting the Layer Charges of Host Phyllosilicates To Prevent Luminescence Quenching of Fluorescence Dyes

Luminous properties of organic fluorescent dyes could be effectively enhanced by adjusting the layer charge of the inorganic host. In this study, we constructed a novel inorganic/organic composite whose layer charge is tunable. This composite material greatly enhanced the luminous efficiency of lucigenin. Compared to the crystalline lucigenin, the fluorescence lifetime of lucigenin increased by 26 folds and luminous intensity was 14 times higher after being intercalated into the interlayer of the saponite host. In addition, the thermal stability was greatly improved. The tunable layer charge can provide a static confinement to the fluorescence dyes and better distribute the lucigenin molecules to prevent fluorescence quenching due to aggregation. The inhibition of fluorescence quenching by intercalating the fluorescence dye into the interlayer of the host inorganic substrate reveals a theoretical significance for the development of high performance organic luminous materials.