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Adeli M.,Lorestan University | Adeli M.,Sharif University of Technology | Soleyman R.,Research Institute of Petroleum Industry RIPI | Beiranvand Z.,Lorestan University | Madani F.,Lorestan University
Chemical Society Reviews | Year: 2013

Despite the great potential of carbon nanotubes (CNTs) in various areas of biomedicine, concerns regarding their carcinogenicity, inefficient dispersion in aqueous solutions and biological activity in vivo still remain. One important and feasible route to overcome these barriers is modification of CNTs with polymers, which are widely studied and play a vital role in biological and biomedical fields, especially in drug delivery. This comprehensive review focuses on the achievements of our and other groups in currently used methods to functionalize the surface of CNTs with polymers to produce anticancer drug delivery systems. We have intensively studied covalent and noncovalent interactions between CNTs and linear, dendritic and hyperbranched biocompatible polymers as well as biomacromolecules interactions which are very crucial to diminish the toxicity of CNTs via changing their conformations. © 2013 The Royal Society of Chemistry.


A new and efficient method for the synthesis of a variety of N-substituted pyrroles from condensation reactions of 2,5-hexanedione with amines or diamines using ZrOCl2·8H2O as a water-tolerant Lewis acid catalyst at room temperature is described.The use of nontoxic, inexpensive, easily available and reusable catalyst under solvent-free conditions make this protocol practical, environmentally friendly and economically attractive. © 2011 John Wiley & Sons, Ltd.


A new and efficient method for the preparation of N-substituted pyrroles from one-pot condensation reaction of 2,5-hexandione with amines and diamines in the presence of cellulose sulfuric acid (CSA) as a bio-supported catalyst at room temperature under solvent-free conditions is presented. This new protocol has the advantages of easy availability, stability, reusability and eco-friendly of the catalyst, high to excellent yields, simple experimental and work-up procedure. © 2010 Elsevier Ltd. All rights reserved.


Rahmatpour A.,Research Institute of Petroleum Industry RIPI
Journal of Organometallic Chemistry | Year: 2012

A new and environmentally benign method for the preparation of N-substituted pyrroles from one-pot condensation reaction of 2,5-hexanedione with amines and diamines in the presence of polystyrene-supported gallium trichloride (PS/GaCl 3) as a highly active and reusable heterogeneous Lewis acid catalyst is presented. This new protocol has the advantages of easy availability, stability, reusability and eco-friendly of the catalyst, high to excellent yields, simple experimental and work-up procedure. © 2012 Elsevier B.V. All rights reserved.


Akbarinezhad E.,Research Institute of Petroleum Industry RIPI
Journal of Supercritical Fluids | Year: 2014

Exfoliated polyaniline-graphite (PAniG) nanocomposite (NC) with high electrical conductivity was synthesized via in situ polymerization of aniline in the presence of intercalated graphite in ScCO2 medium. Ammonium peroxydisulfate (NH4)2S2O8 (APS) was used as an oxidizing agent. The morphology and structure of synthesized PAniG NC was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR). Synthesized PAniG NC was used to modify the barrier properties and cathodic protection behavior of a commercial zinc rich epoxy primer (c-ZRP) on low carbon steel (CS) substrate. The protective properties of original and modified ZRPs (m-ZRP) were investigated using open circuit potential (OCP) measurements and electrochemical impedance spectroscopy (EIS) method. It was found that after immersing coated CS for 365 days in 3.5% sodium chloride solution the OCP for m-ZRP remained at the cathodic protection region (lower than -0.86 V/SCE), while for c-ZRP it was passed out of protection region after immersing 100 days. EIS analysis revealed that in m-ZRP the zinc consumption and formation of zinc oxide was delayed and after 100 days of immersion, resistance of c-ZRP and m-ZRP reaches to 2.48 × 104 Ω and 2.56 × 103 Ω, respectively. Results revealed that the performance of m-ZRP improved due to the barrier properties of PAniG NC which added to the primer. © 2014 Elsevier B.V.

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