Original Research Article
Analytical chemistry
Narges Ajami; Ali Ehsani; Ferydon Babaei; Ashraf Heidaripour
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 72-77
Abstract
Optical modeling was applied for obtaining absorbance spectra and band gap values for different morphology of ZnO semiconductor. In optical modeling, the relative permittivity scalars of zinc oxide coral like nanorods were calculated using the Bruggeman homogenization formalism. ZnO nano rods (ZONRs) ...
Read More
Optical modeling was applied for obtaining absorbance spectra and band gap values for different morphology of ZnO semiconductor. In optical modeling, the relative permittivity scalars of zinc oxide coral like nanorods were calculated using the Bruggeman homogenization formalism. ZnO nano rods (ZONRs) as a nucleus layer were fabricated on the Indium Tin Oxide (ITO) by chronoamperometry (CA) in aqueous solution containing different concentration of zinc nitrate. Reduction of nitrate anion is a good resource for hydroxyl ion that with zinc anion results ZnO. The orientation and morphology of both the nucleus layer and successive coral like ZONRs were analyzed using X-ray diffraction (XRD).
Original Research Article
Organic chemistry
Mohammad Ali Nasseri; Ali Allahresani; Batol Zakeri Nasab
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 78-85
Abstract
Microwave assisted green synthesis of α, ά- bis (substituted- benzylidene) alkanones by the crossed- aldol condensation reaction of substituted aryl aldehydes with ketones in the presence of catalytic amount of NbCl5 in good to excellent yields. This reaction is carried out under solvent-free ...
Read More
Microwave assisted green synthesis of α, ά- bis (substituted- benzylidene) alkanones by the crossed- aldol condensation reaction of substituted aryl aldehydes with ketones in the presence of catalytic amount of NbCl5 in good to excellent yields. This reaction is carried out under solvent-free conditions. The results showed that aldehydes bearing electron–donating substituent's on phenyl-ring favored the formation of product in good to excellent yields with reaction times ranging between 3 and 7 min. In addition, furfural, cinamaldehyde, thiophene-2-carbaldehyde and 5-methylthiophene-2-carbaldehyde were investigated in aldol reaction, and the results showed excellent yields. Also, the reactions were carried out at room & thermal (80 0C) conditions. The results showed that the yields are in accordance with the microwave irradiations, But the time is 1.5-5 h at room temperature and 15-45 min in thermal conditions.
Original Research Article
Analytical chemistry
Ghasem Karim-Nezhad; Ali Pashazadeh
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 86-95
Abstract
In this research, we reported a novel modified carbon ceramic electrode (CCE) using Ni/Al Layered double hydroxide as modifier was fabricated by sol-gel technique. The Ni/Al Layered double hydroxide modified sol gel derived carbon ceramic (Ni/Al LDH-SGD-CC) electrode was used for electrocatalytic oxidation ...
Read More
In this research, we reported a novel modified carbon ceramic electrode (CCE) using Ni/Al Layered double hydroxide as modifier was fabricated by sol-gel technique. The Ni/Al Layered double hydroxide modified sol gel derived carbon ceramic (Ni/Al LDH-SGD-CC) electrode was used for electrocatalytic oxidation of acetaldehyde. The oxidation of acetaldehyde happens at the potential where Ni (III) species are generated. The modified electrode exhibited remarkable electrocatalytic activity for the oxidation of acetaldehyde under alkaline conditions, indicating that the anodic oxidation of acetaldehyde could be catalyzed at Ni/Al LDH-SGD-CC electrode. This proves that the Ni/Al LDH bears the main role in electro-catalytic oxidation of acetaldehyde. Finally, by using the cyclic voltammetry, chronoamperometric and tafel plots method, the catalytic rate constant, charge-transfer coefficient, the number of electrons involved in the rate-determining step (nα) and exchange current density for chemical reaction of acetaldehyde was estimated as 0.356 × 104 cm3 mol-1 s-1, 0.51, 1 and 2.76×10-8 Acm-2 respectively.
Original Research Article
Organic chemistry
Mohammad Javad Taghizadeh; Khosrow Jadidi
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 96-104
Abstract
The catalytic highly regio-, diastereo-, and enantioselective synthesis of a small library of spiropyrrolizidineoxindolesvia a four-component 1,3-dipolar cycloaddition reaction of azomethine ylides, derived from isatin, with electron-deficient dipolarophilewas described. The process occurs at room temperature ...
Read More
The catalytic highly regio-, diastereo-, and enantioselective synthesis of a small library of spiropyrrolizidineoxindolesvia a four-component 1,3-dipolar cycloaddition reaction of azomethine ylides, derived from isatin, with electron-deficient dipolarophilewas described. The process occurs at room temperature in aqueous ethanol as a green solvent and in the presence of a bidendatebis(imine)–Cu(II)triflate complex as catalyst.The reaction mechanism is discussedon the basis of the assignment of the absolute configuration of the cycloadducts.The catalytic highly regio-, diastereo-, and enantioselective synthesis of a small library of spiropyrrolizidineoxindolesvia a four-component 1,3-dipolar cycloaddition reaction of azomethine ylides, derived from isatin, with electron-deficient dipolarophilewas described. The process occurs at room temperature in aqueous ethanol as a green solvent and in the presence of a bidendatebis(imine)–Cu(II)triflate complex as catalyst.The reaction mechanism is discussedon the basis of the assignment of the absolute configuration of the cycloadducts.
Original Research Article
Nanochemistry
Meysam Sadeghi; Sina Yekta; Mirhassan Hosseini; Mohammad javad Taghizadeh
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 105-113
Abstract
In the present study, tenorite (CuO) nanoparticles have been assayed for their catalytic properties. The decontamination reaction of chloro ethyl ethyl sulfide (CEES) as an surrogate of sulfur mustard simulant have been accomplished on the surface of CuO NPs with different weight ratios at ambient temperature ...
Read More
In the present study, tenorite (CuO) nanoparticles have been assayed for their catalytic properties. The decontamination reaction of chloro ethyl ethyl sulfide (CEES) as an surrogate of sulfur mustard simulant have been accomplished on the surface of CuO NPs with different weight ratios at ambient temperature and monitored by Gas chromatography equipped with Flame ionization detector (GC-FID) and Gas chromatography coupled with a mass spectroscopy (GC-MS). CuO NPs were successfully synthesized via precipitation method in the absence and presence of polyvinylpyrrolydone (PVP) and copper (ΙΙ) nitrate as the precursors. PVP was used as a capping agent to control and reduce the agglomeration of the nanoparticles. The synthesized CuO NPs were characterized by Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques. The GC analysis results has revealed that the decontamination of CEES occurred in n-hexane solvent with the weight ratio of 1:40 (CEES: CuO NPs) after 12 h with more than 90% yield. The hydrolysis product such as hydroxyl ethyl ethyl sulfide (HEES) was also identified by GC-MS analysis.
Original Research Article
Organic chemistry
Mehdi Soleimany; Jalil Lari; Hooshang Vahedi; Morteza Imanpour
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 114-120
Abstract
A new facile route for synthesis of 3- (aryl) -8, 9- di (alkyl) thieno [3,2-e] [1,2,4] triazolo pyrimidines derivative from the same starting material, 2- amino - 4,5 -di (alkyl) thiophene-3- carboxamide, has been developed through heterocyclization of the corresponding arylidene-hydrazino -5,6 -di (alkyl) ...
Read More
A new facile route for synthesis of 3- (aryl) -8, 9- di (alkyl) thieno [3,2-e] [1,2,4] triazolo pyrimidines derivative from the same starting material, 2- amino - 4,5 -di (alkyl) thiophene-3- carboxamide, has been developed through heterocyclization of the corresponding arylidene-hydrazino -5,6 -di (alkyl) thieno [2,3-d] pyrimidine under refluxing condition with acetic anhydride followed by air oxidation. The products were obtained in high yield with an easy work-up in simple reaction along with the purification of products by non-chromatographic method. This general synthetic procedure can be extended to the preparation of a wide variety of isomeric triazoles using 2-amino thiophene-3-carboxamide bifunctional derivatives.
![A new facile route to synthesize thieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives](data/icc/coversheet/431411371568.png)
Original Research Article
Organic chemistry
Vahid Azizkhani; Ali Ramazani; Sang Woo Joo
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 121-131
Abstract
Simple, cheap and green protocol for effective conversion of alcohols to corresponding carbonyl compounds in the presence of H14[NaP5W30O110] and ammonium nitrate is reported. The products were characterized by FT-IR and comparison of their physical properties with those reported in the literatures. ...
Read More
Simple, cheap and green protocol for effective conversion of alcohols to corresponding carbonyl compounds in the presence of H14[NaP5W30O110] and ammonium nitrate is reported. The products were characterized by FT-IR and comparison of their physical properties with those reported in the literatures. The progress of the reaction was monitored by thin layer chromatography (TLC) technique. The aliphatic products were detected by gas chromatography–flame ionization detector. Reactions were completed within 15-35 minutes at room temperature. In order to investigate the catalyst reusability, the oxidation of benzyl alcohol was carried out in the presence of H14[NaP5W30O110]. At the end of each reaction, the catalyst was separated and the recovered catalyst was reused for at least three runs without significant degradation in catalytic activity and performance.
Original Research Article
Organic chemistry
Rahimeh Hajinasiri; Sobhan Rezayati
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 132-136
Abstract
An efficient synthesis of Methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives via simple three-component reaction and one-pot reactions between isoquinoline, dimethyl acetylenedicarboxylate and N-phenylthiourea under solvent-free conditions without using any additional ...
Read More
An efficient synthesis of Methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives via simple three-component reaction and one-pot reactions between isoquinoline, dimethyl acetylenedicarboxylate and N-phenylthiourea under solvent-free conditions without using any additional catalyst, is described. The mild reaction conditions and good yields and exhibit the synthetic advantage of this method. Also this method is environmentally friendly. The methods of green chemistry continue to grow in importance. Alternative processes help to conserve resources and can even reduce costs. The replacement of convention solvents with water or solvent-free conditions, which is harmless to health and is available in large quantities. The thiazolium rings are key units in agricultural compounds and drugs.
![Synthesis of methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives under solvent-free condition](data/icc/coversheet/691425272766.jpg)
Original Research Article
Inorganic chemistry
Maryam Movahedi; Fahimeh Kazemi-Cheryani; Nahid Rasouli; Hossein Salavati
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 137-142
Abstract
In the present work, the ZnFe2O4 nanoparticle has been successfully synthesized. The obtained sample was characterized by X-ray diffraction (XRD), emission scanning electron microscopy (FE-SEM) and its optical property was examined by UV-Vis spectrophotometer. FE-SEM revealed that the particle size of ...
Read More
In the present work, the ZnFe2O4 nanoparticle has been successfully synthesized. The obtained sample was characterized by X-ray diffraction (XRD), emission scanning electron microscopy (FE-SEM) and its optical property was examined by UV-Vis spectrophotometer. FE-SEM revealed that the particle size of the ZnFe2O4 of about 47 nm was synthesized. The photocatalytic performance under UV-Vis and visible light were evaluated by decolorization of congo red (CR) anionic dye solution. The UV-Vis and visible light irradiation source are a high pressure mercury lamp, 400 W and filament tungsten lamp 100 W respectively. The photocatalytic results show that the ZnFe2O4 sample can be 100% degrading (CR) dye solution after 30 and 120 min under UV-Vis and visible irradiation respectively
Original Research Article
Organic chemistry
Masoomeh Abdoli; Maryam Hajibabaiee
Volume 3, Issue 2, pp. 72-147, Serial No. 7 , April 2015, Pages 143-147
Abstract
Some 3, 5-diacyl or 3,5-diester 1,4-dihydropyridines were oxidized to the corresponding pyridine derivatives using hydrogen peroxide in aqueous ethanol in the presence of potassium bromide and acetic acid as the catalysts. The reaction was carried out in ethanol and products were isolated in high to ...
Read More
Some 3, 5-diacyl or 3,5-diester 1,4-dihydropyridines were oxidized to the corresponding pyridine derivatives using hydrogen peroxide in aqueous ethanol in the presence of potassium bromide and acetic acid as the catalysts. The reaction was carried out in ethanol and products were isolated in high to excellent yields. However, oxidation of 3,5-diacetyl 1,4-dihydropyridines is slower than 3,5-diester 1,4-dihydropyridines under the same condition. Furhermore, the reaction is facilitated by electron releasing groups on 4-substituent of dihydropyridine ring. The cheapness of reagent, high yielding, easy workup and mild condition makes this method a useful addition to the available method in organic synthesis. In addition, employment of clean oxidant H2O2 together with nontoxic solvent ethanol makes it friendly to the environment.
)
)
)
)
)
![A new facile route to synthesize thieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives](javascript:loadModal('A new facile route to synthesize thieno[3,2-e][1,2 ... ', 'data/icc/coversheet/431411371568.png'))
)
![Synthesis of methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives under solvent-free condition](javascript:loadModal('Synthesis of methyl 2-[2-(alkylimino)-4-oxo-3-phen ... ', 'data/icc/coversheet/691425272766.jpg'))
)
)