gisya abdi | Razi University of Kermanshah, Iran (original) (raw)

Papers by gisya abdi

BioImpacts

Introduction: Further development of magnetic-based detection techniques could be of significant ... more Introduction: Further development of magnetic-based detection techniques could be of significant use in increasing the sensitivity of detection and quantification of hepatitis B virus (HBV) infection. The present work addresses the fabrication and characterization of a new bio-nano composite based on the immobilization of goat anti-HBsAg antibody on modified core-shell magnetic nanoparticles (NPs) by (3-aminopropyl) triethoxysilane (APTES), named Fe3O4@SiO2/NH2, and magnetic NPs modified by chitosan (Fe3O4@CS). Methods: At the first step, Fe3O4 was modified with the silica and APTES (Fe3O4@SiO2/NH2) and chitosan (Fe3O4@CS) separately. The goat anti-HBsAg antibody was activated by two different protocols: Sodium periodate and EDC-NHS. Then the resulted composites were conjugated with activated goat anti-HBsAg IgG. An external magnet collected Bio-super magnetic NPs (BSMNPs) and the remained solution was analyzed by the Bradford method to check the amount of attached antibody to the s...

Nanomaterials

Doping and its consequences on the electronic features, optoelectronic features, and magnetism of... more Doping and its consequences on the electronic features, optoelectronic features, and magnetism of graphynes (GYs) are reviewed in this work. First, synthetic strategies that consider numerous chemically and dimensionally different structures are discussed. Simultaneous or subsequent doping with heteroatoms, controlling dimensions, applying strain, and applying external electric fields can serve as effective ways to modulate the band structure of these new sp2/sp allotropes of carbon. The fundamental band gap is crucially dependent on morphology, with low dimensional GYs displaying a broader band gap than their bulk counterparts. Accurately chosen precursors and synthesis conditions ensure complete control of the morphological, electronic, and physicochemical properties of resulting GY sheets as well as the distribution of dopants deposited on GY surfaces. The uniform and quantitative inclusion of non-metallic (B, Cl, N, O, or P) and metallic (Fe, Co, or Ni) elements into graphyne de...

RSC Advances

The appearance of PTFE-like nanochains in the structure of fluorinated N–graphyne strongly influe... more The appearance of PTFE-like nanochains in the structure of fluorinated N–graphyne strongly influences both electrochemical and biological properties.

Fuel, 2017

Modified graphene oxide by acetic acid moiety (GO/COOH) was synthesized and employed in the ultra... more Modified graphene oxide by acetic acid moiety (GO/COOH) was synthesized and employed in the ultrasoundassisted oxidative-adsorptive desulfurization processes. The modified graphene oxide was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy The fabricated material was applied to simultaneous oxidation and adsorption of dibenzothiophene (DBT) from model fuel. Adsorption studies were carried out to evaluate its potential for DBT removal. The effects of contact time, initial DBT concentration, and temperature on the removal efficiency of the catalyst-adsorbent were investigated. The equilibrium adsorption results was well-described by the Freundlich isotherm model (at room temperature) and oxidation-adsorption of DBT were achieved by GO/COOH with an outstanding adsorption capacity of 370 mg g−1. The adsorption process followed a pseudo-first-order kinetic model and the adsorption kinetic data suggests that physical interactions are mainly involved on the entire adsorption process (Ea < 40 kJ mol−1). The initial sulfur content of 1000 ppm was reduced to<50 ppm within 300 min, achieving a sulfur removal of about 95%. As a whole, a model fuel with ultra-low sulfur content was obtained by the developed procedure and GO/COOH shows a high potential for effective desulfurization of diesel fuel as a catalyst-adsorbent.

Journal of Membrane Science, 2018

In this research, active groups of biguanide were grafted to the surface of graphene oxide sheets... more In this research, active groups of biguanide were grafted to the surface of graphene oxide sheets through covalent functionalization and combined with magnetic nanoparticles to produce a magnetic graphene-based composite (MMGO). Then, the fabricated MMGO hybrid was introduced into the polyethersulfone (PES) polymer through phase inversion induced by immersion precipitation method. The prepared MMGO embedded PES membranes were examined for pure water flux permeability, salt rejection, antifouling, copper removal, and dye retention capability. The effect of MMGO hybrid on the cross-sectional morphology, hydrophilicity, and roughness of the PES membrane was investigated as well. Embedding MMGO hybrid was eventuated in a significant increase in the pure water flux because of changes in surface roughness and hydrophilicity of the membranes. Besides, the copper and dye removal capability of the prepared membranes remarkably raised due to the presence of hydrophilic functional groups on the surface of MMGO hybrid. The fabricated nanofiltration membrane with 0.5 wt % MMGO hybrid had the highest affinity for copper ions removal (92%). Dye rejection of the MMGO embedded PES membranes at different concentrations of MMGO hybrid was almost the same (about 99%) while the value of the bare PES membrane was 91%. Flux reduction of the MMGO embedded PES membranes was lower than that of the bare PES membrane during repeated filtration.

IRANIAN JOURNAL OF CATALYSIS, 2015

An organosuperbase (N,N-dimethylbiguanide) immobilized on mesoporous and magnetically separable s... more An organosuperbase (N,N-dimethylbiguanide) immobilized on mesoporous and magnetically separable silica supports, was found for the first time, to act as a highly-stable, scalable and efficient heterogeneous catalyst for the Henry reaction under mild and neutral condition. Several factors such as catalyst amount, solvent and reaction time concerning the reactivity were also discussed. The procedure constitutes the first immobilized biguanide promotion of selective synthesis of β-nitroalcohols without addition of stoichiometric amount of any base and showed a broad substrate scope. The uniqueness of this catalyst lay in its cleanness, cost-effectiveness, ease in removal at the end of reaction, and chemoselective formation of a wide range of β-nitroalcohols. These materials can be easily converted to other useful synthetic intermediates which many of them have been exemplified in synthetic organic chemistry and pharmaceutical industry.

RSC Advances, 2017

Lewis or Brønsted acidic methylimidazolium ionic liquid-functionalized Fe 3 O 4 @SiO 2 nanopartic... more Lewis or Brønsted acidic methylimidazolium ionic liquid-functionalized Fe 3 O 4 @SiO 2 nanoparticles were fabricated and applied as an efficient magnetic heterogeneous catalyst for dibenzothiophene (DBT) oxidation in a biphasic system using H 2 O 2 as the oxidant. The structures of catalysts were characterized by SEM, TEM, XRD, TGA, FT-IR, VSM and EDX techniques. The magnetic catalysts showed high catalytic performance in the oxidation of DBT in an n-hexane/acetonitrile biphasic system using H 2 O 2 , and high conversions were obtained. The effects of contact time, temperature, amount of H 2 O 2 and amount of catalyst on the DBT oxidative removal efficiency were investigated. The contact time of 60 min, 0.1 g catalyst, and 4 mL H 2 O 2 at 313 K were found as optimal experimental conditions for an improved DBT oxidative removal process. The sulfur level could be lowered from 100 ppm to less than 7, 5, and 2 ppm under optimal conditions for Fe3O4 @SiO2-Mim-BF4 , Fe3O4 @SiO2-Mim-HSO4 , and Fe3O4 @SiO2-Mim-FeCl4 , respectively. These nanomagnetic heterogeneous catalysts could be easily separated from the reaction mixture by applying an external magnetic field and recycled several times.

Electrochimica Acta, 2015

An interesting sequence of oxidation/Michael addition/oxidation/spirocyclization is observed in t... more An interesting sequence of oxidation/Michael addition/oxidation/spirocyclization is observed in the electrolysis of caffeic acid esters in the presence of barbituric acid derivatives leading to the synthesis of a series of novel spirocycles. In an experimentally simple and clean procedure, the electrolyses proceed via a domino of electrochemical (E) and chemical (C) events with employing electrons as the only reagents in aqueous solution without introducing any catalyst or oxidant. From mechanistic point of view, a new type of domino mechanism (ECECi, Ci = spirocyclization) is proven with a unique Ci phenomenon at final step. Also, in light of experimental and theoretical NMR investigations, highly chemo and regioselectivities have been detected in these synthetic electrolyses.

Gold Bulletin, 2018

This study aims at the synthesis of gold nanoparticles (2-3 nm) functionalized with different nit... more This study aims at the synthesis of gold nanoparticles (2-3 nm) functionalized with different nitroalkane-terminated thiols and investigates the chemical reactivity of these confined nitroalkanes towards aldehydes to yield β-nitroalcohols. Interfacial Henry reaction between fixed nitroalkane-terminated thiols with various aromatic and heteroaromatic aldehydes resulted in stereogenic centers on the surface of mixed-monolayer-protected gold nanoparticles (MMPNs). The ratio of the resulting diastereomers was determined by 1H NMR spectroscopy. It was found that some parameters such as the chain length of nitroalkyl and the nature of aromatic aldehyde play the main role in affecting the diastereomeric ratio on the surface of MMPNs. Certain trends have been analyzed from the data, and it can be inferred that some aldehydes approximately prefer the formation of anti diastereomers as the predominant products, while others give syn β-nitroalcohols. We have attributed this stereoselectivity to the packed layers, forceful lateral interactions (van derWaals), and intramolecular hydrogen bonding on the surface of modified gold nanoparticles that are able to suppress the role of solvent and intermolecular interactions.

Microchimica Acta, 2016

Source: Alizadeh, A., Abdi, G., Khodaei, M. M. (2016). Colorimetric and visual detection of silve... more Source: Alizadeh, A., Abdi, G., Khodaei, M. M. (2016). Colorimetric and visual detection of silver(I) using gold nanoparticles modified with furfuryl alcohol. Abstract The authors describe a colorimetric assay for Ag(I) ions that is highly selective over other metal ions. It is based on the measurement of changes in the surface plasmon resonance absorbance (at 520 nm) of gold nanoparticles (AuNPs) modified with furfuryl alcohol (Fu-AuNPs). The AuNPs were modified with mixed monolayers of 6-nitrohexane-1-thiol and octanethiol as capping ligands. Next, these AuNPs were modified with furfuraldehyde via an interfacial Henry reaction. The unique structure and presence of heteroatoms in the resulting product of the Henry reaction enable the Fu-AuNPs to recognize very low concentrations of Ag(I) ions, and this results in a visually and instrumentally detectable color change from pale-brown to dark blue. TEM images and optical absorption data show that this color change is the result of an aggregation of the Fu-AuNPs upon addition of Ag(I). In contrast, divalent ions such as Cu(II), Zn(II), Co(II), and Pb(II) do not aggregate, or they cause the formation of a black precipitate. The recognition mechanism is attributed to the formation of a sandwich between Ag(I) ion and two furfuryl alcohol moieties that are attached to separate nanoparticles. This simple and fast method can be used to determine Ag(I) ions with a limit of detection as low as 12 nM.

Materials Chemistry and Physics, 2017

Source: Abdi, G., Alizadeh, A. & Khodaei, M.M. (2017). Highly carboxyl-decorated graphene oxide s... more Source: Abdi, G., Alizadeh, A. & Khodaei, M.M. (2017). Highly carboxyl-decorated graphene oxide sheets as metal-free catalytic system for chemoselective oxidation of sulfides to sulfones. Materials Chemistry and Physics, 201, 323-330. http://dx. Abstract Highly-acidic graphene oxide in the presence of hydrogen peroxide was found to act as an efficient metal-free heterogeneous catalyst for oxidation of sulfides to sulfones under mild and neutral condition. Several factors such as catalyst amount, solvent, and reaction time pertaining to achieve the reactivity were also discussed. Sulfone formation increased with an increase in hydrogen peroxide concentration, temperature, and catalyst amounts. The uniqueness of this catalyst lies in its stability, cost-effective, ease in removal at the end of reaction, and chemoselective oxidation of alkyl and aryl sulfides to the corresponding sulfones. The catalyst is recyclable for at least four times only with the little reduction in oxidation of sulfides. Reaction kinetics was found to be pseudo-first order and the calculated activation energy was 32.11 kJ/mol.

Journal of Electroanalytical Chemistry, 2019

Herein, iron oxide magnetic nanoparticles/graphene oxide decorated with acetic acid moieties (Fe3... more Herein, iron oxide magnetic nanoparticles/graphene oxide decorated with acetic acid moieties (Fe3O4/GO/COOH) was synthesized and applied to fabricate a novel nitrite sensor in aqueous solutions (Fe3O4/GO/COOH/GC electrode). Acetic acid moieties were incorporated through nucleophilic reaction of chloroacetic acid with hydroxyl or epoxy groups on the surface of graphene oxide. The morphologies and compositions of fabricated nanomaterials were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction analysis (XRD) and Fourier transform infrared spectroscopy (FTIR). The Electrochemical performance of Fe3O4/GO/COOH/GC electrode was evaluated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry techniques (DPV). The Fe3O4/GO/COOH/GC electrode was employed for the determination of nitrite in aqueous solutions. The DPV results showed a linear response of modified electrode with increasing concentration of nitrite in the range of 1–85 μM and 90–600 μM with a correlation coefficient of 0.99. The Fe3O4/GO/COOH/GC electrode displayed a considerable sensitivity towards nitrite detection with a detection limit of 0.37 μM. Our results suggest the modified electrode as an easy to use and inexpensive candidate for analysis of nitrite concentrations, especially in real samples.

Journal of Molecular Liquids, 2019

Magnetic nanoparticles were integrated with graphene oxide sheets modified by metformin to introd... more Magnetic nanoparticles were integrated with graphene oxide sheets modified by metformin to introduce polyamine functionality in structure. Modified magnetic graphene oxide by metformin (MMGO) adsorption ability was studied for removal of methyl violet (MV) and acid red 88 (AR88) at different pH, initial concentration, and contact time. The successful preparation of magnetic nanoparticles supported with modified graphene oxide sheets is evident from FTIR spectra, TGA, zeta-potential and magnetic measurements. Morphology and chemical structure of the preparedMMGO nanocompositewas studied by TEM, SEM, XPS and EDS analyses. Surface area measurement of the MMGO composite revealed high BET surface area of 226 m2 g−1. Equilibrium isotherms were employed to evaluate the experimental data and calculate the isotherms' parameters. Results showed that adsorption process is based on Langmuir isotherm (R2 N 0.99) and adsorption capacity of fabricated nano-composite was found to be 243 mg g−1 for MV and 303 mg g−1 for AR88. Kinetical results were based on pseudo-second order (R2 N 0.99) and physisorption was main process in the rate-controlling step.

An efficient synthetic method for direct Henry reaction catalyzed by a biguanide; namely metformi... more An efficient synthetic method for direct Henry reaction catalyzed by a biguanide; namely metformin, as an organosuper-base, between a variety of aromatic and aliphatic aldehydes and nitromethane under neat conditions has been developed. Convenient procedure for removal of the catalyst, chemoselective acquiring of β-nitroalcohols as predominant products, as far as possible short reaction time with excellent conversions are advantages of the developed protocol.

Pharmacognosy Research, 2015

Ferulago macrocarpa is a plant used as flavoring agent and protectant in the food industry and as... more Ferulago macrocarpa is a plant used as flavoring agent and protectant in the food industry and as a folk medicinal plant in Iran with no available information on its chemical identity. Ferulago spp. showed to contain biologically terpenoids and coumarins. The objective was to isolate and characterize terpenoids and coumarins from the acetone extract of F. macrocarpa fruits and to evaluate their antiproliferative effects on several cell lines. A series of normal and reverse phase gravity and high-performance liquid chromatography analyses were used to purify constituents. Compounds 1-5 and 7 were evaluated for their cytotoxic effects on MCF-7, HT-29 and H-1299 cell lines. Six compounds including bornyl acetate (1), 1,10-di-epi-cubenol (2), stigmasterol (3) and three coumarins grandivittin (4), prantschimgin (5) and 4&amp;amp;amp;amp;amp;amp;amp;quot;-hydroxygrandivittin (7) along with mixtures of feruloyl derivatives (6a-6c) have been purified. Their structures were established by spectroscopic methods including nuclear magnetic resonance and MS analyses. Compound 2 showed moderate cytotoxicity effect with IC50 values of 5.0 and 6.7 mM on MCF-7 and HT-29, respectively. 1,10-di-epi-Cubenol could be considered as a potential proliferation inhibitor of MCF-7 and HT-29 cell lines.

Journal of Reports in Pharmaceutical Sciences, Jan 28, 2014

Malaria as one of the most recurrent infectious diseases caused by parasites of the genus plasmod... more Malaria as one of the most recurrent infectious diseases caused by parasites of the genus plasmodium, kills several hundred thousand people especially in the tropical and subtropical regions of the world annually. Terpenoids have served as the lead compounds to develop new antimalarial agents. The aromatic monoterpenoid, cuminaldehyde, isolated from the fruits of Bunium persicum was evaluated for antimalarial activity using cell-free β-hematin formation assay. The purified compound showed no inhibitory performance with respect to β-hematin formation. It is presumably due to structural differences between cuminaldehyde and other known active terpenoids.