Organo-Modified Layered Double Hydroxides Switch-On Chemiluminescence

In this study, it was found that sodium dodecylbenzene sulfonate (SDBS)-modified LDHs can significantly enhance the chemiluminescence (CL) from the periodate-hydrogen peroxide (IO4–-H2O2) CL reaction. Using CL spectrum, powder X-ray diffraction measurements, scanning electron microscope images, transmission electron microscopy images, Fourier transform infrared spectroscopy, the quenchers for reactive oxygen species, and elemental analysis techniques, the enhancement mechanism of SDBS-modified LDHs on the IO4–-H2O2 CL was discussed in detail. The results showed that the adsorbed SDBS on the external surface of SDBS-modified LDHs made the disappearance of electrostatic repulsion between anionic surfactants and anionic CL reactants, resulting in the concentrating of anionic CL reactants on the adsorbed surfactant layers of SDBS-modified LDHs and the higher CL efficiency in LDH microenvironment. The success of this work expands currently limited applications of anionic surfactants in CL field.