Papers by Shahrzad Abdolmohammadi
Letters in Organic Chemistry, Jun 14, 2017
Russian Journal of Physical Chemistry A, Apr 1, 2021
The objective of this study is to report usage of laboratory-prepared zirconia-based samples, nor... more The objective of this study is to report usage of laboratory-prepared zirconia-based samples, normal zirconia (ZD), calcined zirconia at 893 K (ZC) and sulfated and calcined zirconia at 893 K (SZC), as potential catalysts for the oxidative removal of sulfur from model oil (dibenzothiophene in iso-octane). Optimum catalyst doses for all catalysts were found to be 1.0 g/L. The catalytic oxidation of DBT on zirconia samples was found to be a gradual process, and quasi-equilibrium reached in 6 h. Kinetic and thermodynamic parameters have also been calculated.
Journal of Heterocyclic Chemistry, 2020
In this work, a series of eight new spiro[3,4′]1,3‐dihydro‐2H‐indol‐2‐one‐2′‐amino‐4′,6′,7′,8′‐te... more In this work, a series of eight new spiro[3,4′]1,3‐dihydro‐2H‐indol‐2‐one‐2′‐amino‐4′,6′,7′,8′‐tetrahydro‐2′,5’(1’H,3’H)‐quinazoline‐diones were successfully synthesized through a three‐component reaction of 1H‐indole‐2,3‐diones (isatins), guanidine nitrate, and 1,3‐cyclohexanediones, by use of Kit‐6 mesoporous silica coated Fe3O4 nanoparticles (Fe3O4@SiO2@KIT‐6) as a highly efficient magnetically separable nanocatalyst in aqueous media at 60°C. Several notable features of thiseco‐friendly protocol are high yields of products, short reaction times, operational simplicity, and the use of easily available and recyclable catalyst.
ChemistrySelect, 2019
Various morphologies of copper (II) oxide (CuO) such as dandelion, sea anemone, walnut, leaf, den... more Various morphologies of copper (II) oxide (CuO) such as dandelion, sea anemone, walnut, leaf, dendrite, rod, fiber, feather, and flake were synthesized and characterized by different methods. The oxidation of indole (IND) and benzothiophene (BT) in mild conditions was studied by various morphologies of CuO. Walnut with the lowest surface area 7.928 (m2g−1) and rod with a high surface area 41.237 (m2g−1) had efficiencies of 5.93% and 91.44% for IND and 0.53% and 88.29% for BT at 4 h, respectively. Zeolite MWW was synthesized by microwave and hydrothermal method on which CuO rod was loaded via wet impregnation method. The results indicated that CuO rod/MWW composite considerably outperformed CuO rod. The oxidations of IND and BT by CuO rod/MWW composite for 75 min was 99.99 and 97.67%, respectively. Based on the results across all experiments, the oxidation of the IND was higher than that of BT. CuO rod/MWW composite was shown to be an efficient catalyst for oxidation of nitrogen and ...
Zeitschrift für Naturforschung B, 2018
A novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrid... more A novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).
Molecular Diversity
A new series of azo chromene dyes were synthesized via a facile cyclocondensation reaction of (E)... more A new series of azo chromene dyes were synthesized via a facile cyclocondensation reaction of (E)-1,2-diphenyl-1-diazene and 4-aminocoumarin with 1:2 molar ratio catalyzed by the polyaniline-Fe3O4@ZnO nanocomposite (PANI-Fe3O4@ZnO). The salient features of this protocol lie in simple experimental procedure, moderate reaction conditions, and uses PANI-Fe3O4@ZnO nanocomposite as a magnetically separable heterogeneous catalyst. Two well-known methods were employed for assessing the antioxidant abilities of the target compounds, including free radical trapping of 2,2-diphenyl-1-picrylhydrazyl (DPPH), as well as ferric reducing antioxidant power assay. Also, several synthesized compounds were screened for their in vitro antimicrobial activities by employing the disk diffusion test on Gram-negative as well as Gram-positive bacteria.
South African journal of chemistry, 2014
A very simple and environmentally benign approach for the synthesis of 3-amino-1H-chromenes is de... more A very simple and environmentally benign approach for the synthesis of 3-amino-1H-chromenes is described using ZnO nanoparticles thin-film as an efficient heterogeneous catalyst in green media, namely water. The mild reaction conditions, reusability of the catalyst, easy work-up and high yields of products make the present protocol sustainable and advantageous compared to conventional methods. KEYWORDS 3-Amino-1H-chromene, aqueous medium, hydrothermal solution method, reusability of the catalyst, ZnO nanoparticles thin-film.
We investigate the ZnO role in the inherent protection of old manuscripts to protect them against... more We investigate the ZnO role in the inherent protection of old manuscripts to protect them against environmental damaging effect of ultraviolet radiation, pollutant gasses, mold and bacteria. In this study a cellulosic nanocomposite of ZnO were used as protective coating on the surface of paper fibers. This layered nanocomposite can act as a consolidate materials too. Furthermore, to determine how well paper works screen objects from the damaging effects, two accelerated aging mechanisms due to light and heat are discussed. Results show good stability of papers with nanocomposite coating. Also, a good light stability was shown in the colored paper that treated with this nanocomposite. Furthermore, to demonstrate the degree of antifungal and antibacterial properties of coated papers, papers was treated with four common molds and bacteria and the good preventive effects of coated paper against molds and bacteria are described.
![Research paper thumbnail of Activated Carbon/MoO3: Efficient Catalyst for Green Synthesis of Chromeno[d]pyrimidinediones and Xanthenones](https://a.academia-assets.com/images/blank-paper.jpg)
Combinatorial Chemistry & High Throughput Screening, 2021
Background: Nanoscale metal oxide catalysts have been extensively employed in organic reactions b... more Background: Nanoscale metal oxide catalysts have been extensively employed in organic reactions because they have been found to influence the chemical and physical properties of bulk material. The chromene (benzopyran) nucleus constitutes the core structure in a major class of many biologically active compounds, and interest in their chemistry consequently continues because of their numerous biological activities. The xanthene (dibenzopyran) derivatives are classified as highly significant compounds which display a number of various bioactive properties. Pyrimidinones have also gained interest due to their remarkable biological utilization, such as antiviral, antibacterial, antihypertensive, antitumor, and calcium blockers effects. Objective: The aim of this work presented herein was to prepare activated carbon/MoO3 nanocomposite and explore its role as a green and recyclable catalyst for the synthesis of chromeno[d]pyrimidinediones and xanthenones under ethanol-drop grinding at roo...
RSC Advances, 2019
Cross-dehydrogenative coupling reactions between two unmodified C–H bonds are one of the most att... more Cross-dehydrogenative coupling reactions between two unmodified C–H bonds are one of the most attractive and fundamental strategies for the construction of C–C bonds.
Nashrieh Shimi va Mohandesi Shimi Iran, Apr 7, 2019
Combinatorial Chemistry & High Throughput Screening, 2021
Aim and Objective: In the last decades, it has extensively been verified that nanostructured tran... more Aim and Objective: In the last decades, it has extensively been verified that nanostructured transition metal oxides emerge as inexpensive, available and extremely efficient heterogeneous catalysts in chemical transformations. The high electrical conductivity, high carrier concentration, and improved reactivity in cadmium oxide nanoparticles (CdO NPs) make it as a potential candidate for applications in the fields of nanocatalysis. [1]Benzopyran and pyridopyrimidine derivatives compose major classes of heterocyclic compounds, which have a wide spectrum of biological activities. Materials and Methods: In the present work, we report a facile and highly effective synthesis of 8- aryl-8H-[1,3]dioxolo[4,5-g][1]benzopyran-6-carboxylic acids and 1,3-dimethyl-2,4-dioxo-5- phenyl-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids via CdO NPs catalyzed cyclo condensation reaction of 4-substituted phenylmethylidenepyruvic acids with 3,4- methylenedioxyphenol or 6-amino-1,3-dimethy...
![Research paper thumbnail of Nickel(II) chromite nanoparticles promoted efficient synthesis of novel [1]benzopyrano[4,3-b]pyridines in aqueous media](https://attachments.academia-assets.com/90886794/thumbnails/1.jpg)
Monatshefte für Chemie - Chemical Monthly, 2020
A library of new 9,11-dimethyl-7-aryl-6H-[1]benzopyrano[3′,4′:5,6]pyrido[2,3-d]pyrimidine-6,8,10(... more A library of new 9,11-dimethyl-7-aryl-6H-[1]benzopyrano[3′,4′:5,6]pyrido[2,3-d]pyrimidine-6,8,10(9H,11H)triones was successfully synthesized via one-pot three-component reaction of 4-aminocoumarin, aromatic aldehydes, and 1,3-dimethylbarbituric acid using nickel(II) chromite nanoparticles as an efficient novel heterogeneous catalyst in aqueous media at 70 °C. The presented reaction is presumed to proceed via a domino Knoevenagel condensation-Michael addition, followed by intramolecular cyclization, and subsequent aromatization. The structures of the title compounds which have been successfully synthesized for the first time in this work were characterized by IR, 1 H NMR, and 13 C NMR spectroscopic data and also by elemental analysis. Surprisingly, the new protocol described herein provides several advantages such as high yields of products, short reaction times, mild reaction conditions, easily operated and environmentally friendly procedure. Furthermore, the catalyst can be recovered conveniently and reused without obvious loss of activity.
Zeitschrift für Naturforschung B, 2019
A TiO2–SiO2 nanocomposite catalyzes the one-pot cyclocondensation reaction of 1H-indole-2,3-dione... more A TiO2–SiO2 nanocomposite catalyzes the one-pot cyclocondensation reaction of 1H-indole-2,3-diones (isatins), 1,3-cyclohexanediones, and urea at T = 70°C under solvent-free conditions with high efficiency. The present method affords the corresponding spiro products in high yields and short reaction time. The unique features of the TiO2–SiO2 nanocomposite are high catalytic activity, ease of preparation, non-toxicity, low loading, and recyclability.
DESALINATION AND WATER TREATMENT, 2019
Due to the extensive use of radioisotopes, effective methods to manage radioactive waste are high... more Due to the extensive use of radioisotopes, effective methods to manage radioactive waste are highly required. For this reason, the capture of cesium ion from groundwater and aquatic ecosystems has attracted special attention. In the present study, the synthesized titanate nanotubes can be applied to remove cesium ion from aqueous solutions through the cation exchange process. In addition, the ion exchange properties of titanate nanotubes were investigated by calculation of the adsorption of cesium ion through the batch method. Hence, the effect of initial concentration, pH and the contact time of solution and exchanger phases on the adsorption value and the optimum conditions for optimal performance of exchanger for the capture of cesium ion were determined. In this regard, the titanate nanotube was synthesized hydrothermally at the optimum temperature of 150°C. After that, 0.1 g of this titanate nanotube was exposed to 50 mg/L of cesium ion at pH = 6 and 25°C temperature in 25 mL of wastewater. Batch experiments confirmed that around 85% of cesium ion (4.25 mg/mL) could be captured 90 min after induction. In addition, in order to evaluate the biocompatibility of these titanate nanotubes, MTT assay was used for their cytotoxicity potential. X-ray diffractometer analysis represented a nanoscale composition with anatase phase which showed that the arranged titanate nanotube was crystallized and had a BET surface area of 194.4 m 2 /g. Furthermore, the kinetic data were described with pseudo-first and second-order models, and results showed that the Freundlich model was more suitable than the Langmuir model to describe the equilibrium of cesium ion.
Molecular Diversity, 2019
In the present study, iron oxide magnetic nanoparticles (Fe 3 O 4 MNPs) were synthesized in a gre... more In the present study, iron oxide magnetic nanoparticles (Fe 3 O 4 MNPs) were synthesized in a green biosynthetic manner using aqueous extract of clover leaves. Fe 3 O 4 MNPs were applied as a magnetically separable nanocatalyst for the green syntheses of functionalized [1,3]-oxazoles 1(a-e) and 1H-pyrrolo-[1,3]-oxazoles 4(a-i) as promising antioxidant compounds in excellent yields at 50 °C and room temperature, respectively. The antioxidant activities of the most stable compounds (1a, 1b, 4a, and 4b) were evaluated by both 2,2-diphenyl-1-picrylhydrazyl radical scavenging and ferric reduction activity potential assays. Compound 1b was shown a remarkable radical scavenging activity, and 4a was shown very good reducing activity relative to standards (BHT and TBHQ).
International Journal of Organic Chemistry, 2012
A simple and fastthree-component synthesis of new and biologically active hexahydro-2-quinolineca... more A simple and fastthree-component synthesis of new and biologically active hexahydro-2-quinolinecarboxylic acid scaffold 4 was carried out using cyclocondensation reaction of arylmethylidenepyruvic acids 1, 1,3-cyclohexandiones 2 and ammonium acetate 3 under solvent-free conditions and at room temperature. This protocol has the advantages of facility, easy work-up, high yields, short reaction time and environmentally friendly character.
Applied Catalysis B: Environmental, 2011
The reverse micellar peroxotitanium-containing catalyst [C18H37N(CH3)3]7[PW10Ti2O38(O2)2] was ass... more The reverse micellar peroxotitanium-containing catalyst [C18H37N(CH3)3]7[PW10Ti2O38(O2)2] was assembled in the organic solvent and the structure was characterized by Fourier transform infrared spectroscopy(FT-IR), Diffuse reflectance UV–vis spectrum (DR-UV–vis), X-ray photoelectron spectrum (XPS), transmission electron microscopy (TEM), Energy dispersive X-ray analysis (EDAX), and Matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry. Direct oxidation of dibenzothiophene (DBT) using O2 was performed by this
Combinatorial Chemistry & High Throughput Screening, 2018
Aim and Objective: Results of pharmacological studies have revealed that chromenes (2H-1-benzopyr... more Aim and Objective: Results of pharmacological studies have revealed that chromenes (2H-1-benzopyran derivatives) and xanthenes (dibenzopyrans) constitute major classes of heterocyclic compounds, due to their useful biological activities. Moreover, during the last decade, the use of metal oxide nanoparticles (NPs) as heterogeneous catalysts has been extensively studied due to their high physical and chemical abilities. The aim of the ongoing research was to prove the catalytic efficiency of the synthesized TiO2 NPs supported by carbon nanotubes (TiO2-CNTs) for the preparation of these heterocyclic scaffolds. Materials and Methods: The present work is focused on a green and efficient synthesis of [1]benzopyrano[b][1]benzopyran-6-ones and xanthenols via a pseudo three-component reaction of salicylaldehydes with active methylene compounds including 4-hydroxycoumarin (4-hydroxy-2H-1- benzopyran-2-one) or 3,4-methylenedioxyphenol, in a molar ratio of 1:2. The reaction was carried out in t...
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Papers by Shahrzad Abdolmohammadi