April 2012

Preconcentration of Ni(II) from sample water by modified poly (ethylene terephthalate)-grafted-acrylic acid/acryl amide fiber

Modified poly (ethylene terephthalate)-grafted-acrylic acid/acryl amide fiber was prepared by adding acrylic fibers to methanolamine (PET-AA/AAm) with different concentration solutions. The stability of a chemically modified PET-AA/AAm fiber especially in concentrated hydrochloric acid which was then used as a recycling and Preconcentration reagent for further uses of modified PET-AA/AAm fiber. The application of this...

Author(s): Ali MOGHIMI and Majid Abdouss  

April 2012

Theoretical study of phthalane oxidation and effect of substituents by using Hyperchem program

The effect of substituents on the relative stabilization energy (ERS) of phthalane-X carbocations has been studied with PM3 semi-empirical molecular orbital theory. The results show that the amino group gives ERS less than zero for very big amount and that will increase stability of carbocation by π-electron donation, whereas the nitro group gives height amount of ERS more than zero and that will...

Author(s): Mohammed Oday Ezzat and Mohd Nizam Mordi