مشخصات پژوهش

Layered double hydroxides (LDHs) or hydrotalcite-like compounds are presented by the general formula [M1-xII MIIIx (OH)2 ]x+ [An-]x/n .yH2O. The basic structure of an LDH may be derived by substitution of a fraction of the divalent cations in a brucite lattice with trivalent cations such that the layers acquire a positive charge, which is balanced by intercalation of anions (and, usually, water) between the layers.1,2 In this role they have been used extensively as ion-exchange materials, catalysts, sorbents and halogen absorbers. 1,3,5 benzene tricarboxylate, (BTC3-) , as anionic form, was selected to modify the magnesium / aluminum (Mg/Al) layered double hydroxide (LDH) using the coprecipitation method. Powder X-ray diffraction (XRD) and Fouriar transform infrared (FT-IR) and elemental analyses (CHN) methods were used to identify the incorporaction of BTC3- within the inorganic nanolayers of LDH. Powder x-ray diffraction pattern of BTC-Mg-Al-LDH nanohybrid shows that the interlayer distance has very small change which corresponds to a horizontal orientation of 1,3,5 benzene tricarboxylate anion (fig. 1). The interlayer structure, hydrogen bonding, and subsequent changes of LDH compounds containing trimesic acid anions will be investigated by molecular simulation.