Design of one-pot green protocol for the synthesis of novel modified LDHs with diacids based on amino acids: morphology and thermal examinations

Abstract

In this study, a simple, fast and environmentally friendly protocol has been proposed for the synthesis of layered double hydroxides (LDHs) and organomodified chiral LDHs under ultrasound irradiation as a green and fast tool for the first time. Novel chiral LDHs were synthesized in one step from the co-precipitation reaction of the Al(NO3)3·9H2O, Mg(NO3)2·6H2O and different bioactive N-trimellitylimido-l-amino acids in aqueous state. The obtained materials were studied by several methods such as Fourier transformed infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy techniques. The results of structural and morphological analyses showed the successful intercalation of chiral diacids within the interlayer of LDH clay. Thermal properties were investigated by thermogravimetry analysis. The results showed that there were four weight loss steps during the thermal decomposition. The amino acid containing N-trimellitylimido diacid created a chiral environment in the modified LDH that could be used in the chiral field.