Intercalation of naphthalene-2,6-disulfonate between layers of Mg and Al double hydroxide: preparation, powder X-Ray diffraction, fourier transform infrared spectra and X-Ray photoelectron spectra

By means of the coprecipitation method, a Mg/Al-layered double hydroxide with interlayer naphthalene-2,6-disulfonates having a basal spacing of 1.68 nm was prepared for the first time. Results are compared here with those of other layered double hydroxides having interlayer naphthalene disulfonates. Fourier transform infrared spectra of the intercalated compounds reveal that the organic anions located at the interlayer gallery are stable. Coordination of oxygen in the–SO3− group of the interlayer molecule is observed. X-ray photoelectron spectra indicate that Al3+ ions in the layers are octahedrally coordinated.