Probing the interactions between lucigenin and phyllosilicates with different layer structures

The incorporation of organic fluorescent dyes into inorganic matrixes could greatly improve the luminous properties of organic dyes. In this study, we investigated the effect of three different types of layered mineral clays on the luminous properties of lucigenin (bis-N-methylacridinium nitrate, BNMA). Attempts were made to fit the isothermal data using Langmuir and Freundlich equations. The adsorption of BNMA onto montmorillonite and kaolinite were fitted well by Langmuir isotherm equation while that of BNMA onto rectorite was fitted by Freundlich equation. The results indicated that the adsorptive behavior, which was resulted from the different layer structures, had a direct impact on the luminous properties of the composites.