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Experimental Investigation of Mobility and Reactivity of Iron Nanoparticles in Porous Media and Application for in-Situ Groundwater Remediation
, Ph.D. Dissertation Sharif University of Technology ; Shamsaei, Abolfazl (Supervisor) ; Vosoughi, Manoochehr (Supervisor)
Abstract
In the present study, synthesis, preparation, and application of bimetallic iron/nickel nano-particles were experimentally investigated with the aim of groundwater remediation. Firstly, iron/nickel nano-particles were synthesized according to chemical reduction and stabilization with starch biopolymer, and then characterized. Results confirmed the formation of bimetallic iron/nickel nano-particles with mean size of 75 nm that starch placed around of them. The more stability characteristic and also enough mobility ensure their diffusion through porous media. Secondly, reactivity of synthesized nano-particles for removal of various contaminants including nitrate, chromium, and lead were...
Theoritecal Investigation of Kinetics and Thermodynamic of Vitamin Antioxidants Reaction Mechanism, in Particular Vitamin C, with Free Radicals
, M.Sc. Thesis Sharif University of Technology ; Gholami, Mohammad Reza (Supervisor)
Abstract
Antioxidants are compounds which prevent free radicals from aggregation and formation in body cells. vitamin C, E and carotene are among the most important antioxidant that have reduction properties. free radicals have great chemical reactivity which can react with different types of compound in human body such as lipids, cell membrane and proteins and cause different illnesses. Antioxidants with various mechanisms such as hydrogen atom transfer, single electron transfer SPLET, sequential proton loss electron transfer and radical adduct formation can stable free radicals and also become non-active compounds, antioxidant properties of these compounds related to structure and their functional...
Design and Synthesis of the Late Transition Metal Complexes Based on Naphthalimide and Pyridine Ligands and Study of their Photophysical Properties
, Ph.D. Dissertation Sharif University of Technology ; Jamali, Sirous (Supervisor)
Abstract
In the first project, we have described the preparation of quadruply linked naphthalimide compounds 3-6. These compounds showed weak and strong excimeric emissions in solid and solution states, respectively. The experimental and theoretical results showed that the adjacent naphthalimide rings were oriented in solution so that intramolecular interchromophoric interactions enhanced the quantum yield efficiencies. However, although the strong intramolecular π and solute-solvent interactions in solution were replaced by n→π*, inter- and intramolecular π-interactions in the solid state, the naphthalimide units were aligned so that the quantum yield efficiencies were diminished. Also, a rise in...