Sonochemical Preparation and Characterization of Modified CuO Nanocrystalline With Bioactive Chiral Diacids Derived From Different Natural Amino Acids
作者:Shadpour Mallakpour、Maryam Vahabi
DOI:10.1080/15533174.2015.1137047
日期:2016.11.1
To improve the dispersion ability of CuO nanoparticles (NPs), their surface was modified by chiral diacids (DAs) containing amino acids. The surface modification process was achieved using ultrasonic irradiation. DA could be absorbed on the surface of CuO. The carboxyl groups of DA may interact with surface of CuO NPs and form covalent bond with it. Interactions between DAs and CuO NPs were investigated
In this study, a simple, fast and environmentallyfriendly 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
An efficient and convenient protocol for the synthesis of optically active [1,2,4]triazolo[3,4-<i>b</i>][1,3,4]thiadiazole derivatives containing L-amino acid moieties
Abstract New triazolothiadiazoles bearing L-amino acid moieties were synthesized by reaction of 4-amino-5-phenoxy-4H-1,2,4-triazole-3-thiol with L-amino acids in the presence of phosphorus oxychloride.
NANOSTRUCTURE FORMATION IN CHIRAL POLY(AMIDE-IMIDE)S BASED ON DOPAMINE MOIETY AND N-TRIMELLITYLIMIDO-L-AMINO ACIDS IN THE MAIN CHAIN
作者:S MALLAKPOUR、A ZADEHNAZARI
DOI:10.4067/s0717-97072012000300011
日期:——
Nanostructured poly(amide-imide) (PAI) materials have been produced by polymerizing a diamine monomer, 3,5-diamino-N-(3,4-dihydroxyphenethyl) benzamide, with four trimellitic anhydride-derived, imide ring-preformed chiral amino acid-based dicarboxylic acids. Polycondensation reactions were carried out in the presence of small amount of molten tetrabutylammonium bromide as a green molten salt medium and triphenyl phosphite as the activator by classical heating method. Field emission scanning electron microscopy micrographs showed that the prepared polymers are assembled by spherical particles, which are distributed uniformly and randomly, having nano-sized diameter ranged between 46-54 nm. According to X-ray diffraction patterns, all of PAIs are amorphous. They show excellent solubility in a variety of amide polar solvents and even in less polar solvents such as m-cresol and pyridine. The obtained PAIs were also characterized by Fourier transform infrared spectroscopy, H-1 NMR, elemental, and thermogravimetric analysis techniques. The effect of ultrasound on the morphology of polymers was also investigated. This study confirmed that the size of polymer particles was decreased and the shape of them was also changed.