Journal of the Iranian Chemical Research: 4 (3)

Open Access Article

1 - Electrochemical behaviour of lead in hydrochloric acid solution in the presence of inorganic ions
Belkheir Hammouti Rachid Salghi Mohammed Mihit Lahcen Bazzi

The electrochemical behaviour of lead electrode in hydrochloride solution containing variousoxo-anions at different concentrations was studied by using of cyclic voltammetry (CV) method.Results obtained show that the addition of these inorganic compounds decreases the a More

The electrochemical behaviour of lead electrode in hydrochloride solution containing variousoxo-anions at different concentrations was studied by using of cyclic voltammetry (CV) method.Results obtained show that the addition of these inorganic compounds decreases the anodic andcathodic currents peaks according to the following order: H2PO4- > HPO42-> SO42-. It’s revealedalso that the cathodic current density related to the reduction of Pb2+ ions dissolved in solutiondecreases with the oxo-anions concentration. When the addition of sulphates ions concentrationreaches 0.34 mol L-1, the formation of PbSO4 is highly favoured. Therefore, the intersticesbetween the crystals of PbSO4 encourage the dissolution of lead and the formation of insolublePbCl2 layer on the lead surface involving the passivation phenomenon. Manuscript profile

Open Access Article

2 - Removal of thiocyanate ions from aqueous solutions using polypyrrole and polyaniline conducting electroactive polymers
Reza Ansari Nilofar Khoshbakht Fahim, Ali Fallah Dellavar

Polypyrrole (PPy/Cl) and polyaniline (PAni/Cl) synthesized chemically onto sawdust (SD)was used for removal of thiocyanate (SCN-) ions from aqueous solutions. The effect of someimportant parameters such as pH, initial concentration, sorbent dosage, and contact time onup More

Polypyrrole (PPy/Cl) and polyaniline (PAni/Cl) synthesized chemically onto sawdust (SD)was used for removal of thiocyanate (SCN-) ions from aqueous solutions. The effect of someimportant parameters such as pH, initial concentration, sorbent dosage, and contact time onuptake of SCN- was investigated. PPy/SD was found to be much more effective sorbent thanPAni/SD for uptake SCN- from aqueous solutions. Removal of SCN- ions using PPy/Cl issupposed to be occurred mostly via ion exchange process at the surface of polymer coated ontosawdust as a very thin film. Desorption studies were also carried out for figuring out thepossibility of the regeneration and reuse of the exhausted adsorbent. A proposed mechanismbased on interesting anion exchange properties of the PPy/Cl has been discussed. It was foundthat polypyrrole conducting polymers doped with releasable counterions can be used for used toremove some anions via ion exchange process under simple open circuit conditions. The findingin this paper shows the promising application of polypyrrole conducting polymers in future wateror wastewater purification technology. Manuscript profile

Open Access Article

3 - Synthesis, spectral, thermal and biological properties of some novel coordination compounds of VO(IV) and biological 4[N-(4′-ethylbenzalidene) amino] antipyrine thiosemicarbazone and 4[N-(2′, 4′-dimethyl benzalidene amino] antipyrine thiosemicarbazone
Surendra Prasad Ram Kumar Agarwal Hans Raj Modi

In present studies the synthesis, characterization and biological properties ofoxovanadium(IV) coordination compounds of 4[N-(4′-ethylbenzalidene)amino] antipyrinethiosemicarbazone (EBAAPTS) and 4[N-(2′,4′-dimethylbenzalidene)amino] antipyrinethiosemic More

In present studies the synthesis, characterization and biological properties ofoxovanadium(IV) coordination compounds of 4[N-(4′-ethylbenzalidene)amino] antipyrinethiosemicarbazone (EBAAPTS) and 4[N-(2′,4′-dimethylbenzalidene)amino] antipyrinethiosemicarbazone (DMBAAPTS) with the general composition VOX2L (X = C1-, Br-, I-, NO3-or NCS-) and VO(CIO4)2(L)H2O (L = EBAAPTS or DMBAAPTS) are described . All thecomplexes were characterized by elemental analyses, molar mass, molar conductance, magneticsusceptibility, infrared and electronic spectra. In all these complexes, both thethiosemicarbazones behave as neutral tridentate (N, N, S) ligands. The thermal properties of therepresentative complexes are also reported. The most probable geometry of the complexes isproposed. Manuscript profile

Open Access Article

4 - Sulfuric acid immobilized on silica: A versatile and reusable heterogeneous catalyst for the synthesis of phenanthrimidazole derivatives
Hossein Behmadi Seyed Mahdi Saadati Mina Roshani Hasan Mohammadi Abbas Razavi Marjan Ramezani

A new, convenient, efficient, and cost-effective one-pot synthesis of 1Hphenanthro[9,10]imidazol-2-yl from phenanthraquinone and aldehydes, using sulfuric acidimmobilized on silica as catalyst is described. The present methodology offers severaladvantages such as excell More

A new, convenient, efficient, and cost-effective one-pot synthesis of 1Hphenanthro[9,10]imidazol-2-yl from phenanthraquinone and aldehydes, using sulfuric acidimmobilized on silica as catalyst is described. The present methodology offers severaladvantages such as excellent yields, simple procedure, shorter reaction times, the use ofinexpensive reagents, easy recovery and eco-friendly. In addition to these, 2-alkylphenanthrimidazole is obtained from triethyl orthoesters in good yields. Manuscript profile

Open Access Article

5 - Chemical cross linking versus high energy electron beam cross linking of HDPE: electrical properties study
Nooredin Goodarzian Mohammad Amin Shamekhi

Cross linking of high density polyethylene (HDPE) was first performed via high energy10 Mev electron beam (EB) irradiation. HDPE was also cross linked withDicumyle peroxide (DCP).The gel content of samples was determined by solvent extraction.Degree of cross linking was More

Cross linking of high density polyethylene (HDPE) was first performed via high energy10 Mev electron beam (EB) irradiation. HDPE was also cross linked withDicumyle peroxide (DCP).The gel content of samples was determined by solvent extraction.Degree of cross linking was evaluated by hot set apparatus; as well .In order to clarify the effectof nature of cross linking, correlation of electrical properties such as volume resistively,dielectric constant, dielectric strength with the type of cross linking system was made. It wasfound that, in the same amount of gel content, electrical properties of samples cross linked by thetwo methods, differed. Manuscript profile

Open Access Article

6 - Thermal and catalytic degradation study of polyethylene and investigation the catalytic effect of X-Zeolite and Silica-Alumina on degradation kinetic
Mohammad Taghi Taghizadeh Parinaz Seifi-Aghjekohal Ali Bahadori, Banafsheh Zeraatkar

The thermal degradation of polyethylene (PE) was carried out in the absence and presence ofcatalystes X-Zeolite and Silica-Alumina at different temperatures. The optimum PE/Catalysisratio was 0.25:0.05 g/g, which produced highest degradation value. PE and PE/Catalysis w More

The thermal degradation of polyethylene (PE) was carried out in the absence and presence ofcatalystes X-Zeolite and Silica-Alumina at different temperatures. The optimum PE/Catalysisratio was 0.25:0.05 g/g, which produced highest degradation value. PE and PE/Catalysis werecharacterized by thermogravimetric analysis. The thermal degradation properties of polymerhave been studied by Infrared spectroscopy–FT-IR. Experimental data indicated that thepresence of catalysis greatly increased the rate of degradation of PE. The activation energy ofdegradation for pure polyethylene and polyethylene in presence catalysises was calculated byArrhenius equation and Ozawa method. Activation energy follows the order PE < PE/Silica-Alumina < PE/X-Zeolite. Manuscript profile

Open Access Article

7 - Synthesis of Novel 17-Oxo-17a-Aza-D-Homo-3, 5-Seco-Steroids as Potential 5α-Reductase Inhibitors
Manoj Kumar Saurabh Aggarwal Suresh Thareja Preeti Arora Priyanka Malla Tilak Raj Bhardwaj

Benign prostatic hyperplasia (BPH) is a non-malignant enlargement of the prostate gland. Itis a leading disorder of the elderly male population. Excessive production of dihydrotestosteronehas been implicated in this pathological condition. Steroidal 5α-reductase i More

Benign prostatic hyperplasia (BPH) is a non-malignant enlargement of the prostate gland. Itis a leading disorder of the elderly male population. Excessive production of dihydrotestosteronehas been implicated in this pathological condition. Steroidal 5α-reductase is a membrane boundNADPH dependent enzyme which is responsible for the conversion of testosterone (T) todihydrotestosterone (DHT). Therefore, inhibition of production of DHT by 5α-reductaseinhibitors is an important approach for the treatment of BPH. The proposed 17-oxo-17a-aza-Dhomo-3,5-seco-steroids (17-20) have been synthesized using diosgenin as the starting material.Diosgenin was converted to 17-oxo-3, 5-seco-4-nor-androstan-3-oic acid following six steps:Oppenauer oxidation, Lemieux-von Rudloff oxidation, Wolff-Kishner reduction, Markerdegradation, oximation and Beckmann rearrangement. 17-Oxo-3, 5- seco-keto acid was thenconverted to 17-oxo-17a-aza-D-homo-3, 5-seco-4-nor-androstan-3-oic acid by oximationfollowed by Beckmann rearrangement. The resulted seco-keto acid was then treated with thionylchloride and the respective amines and phenols to get the desired 3, 5-seco-steroidal amides (17-18) and esters (19-20) respectively. Manuscript profile

Open Access Article

8 - Removal of hazardous reactive blue19 dye from aqueous solutions by agricultural waste
Nima Razzaghi Asl Mahmood Abassi

Low-cost grapefruit peel (Agricultural Waste) was used for removal of reactive blue19 dye fromaqueous solutions. The process was studied as a function of contact time, initial dye concentration andpH. Adsorption process was attained to the equilibrium within 45 min for More

Low-cost grapefruit peel (Agricultural Waste) was used for removal of reactive blue19 dye fromaqueous solutions. The process was studied as a function of contact time, initial dye concentration andpH. Adsorption process was attained to the equilibrium within 45 min for initial dye concentrations of 50,75, and 100 mg L-1. An acidic medium was the optimum condition for adsorption of dye at roomtemperature. The maximum dye removal of 83.56 % could be achieved at initial pH 2 using adsorbentdosage of 0.5 mg in 150 ml (50 mg L-1 dye concentration) and agitation rate of 180 rpm. The adsorptioncapacity was found to be about 12.534 mg g-1. The isotherm data could be well described via Langmuirequation with the correlation coefficient of 0.986 in dye concentration range of 50-100 mg L-1 at 25 ◦C.Kinetic studies revealed that the experimental data correlated well with pseudo second-order modelpossessing regression coefficient of R2 ≥ 0.999. Scanning Electron Micrographs provided a supportingevidence for efficient dye sorption onto grapefruit peel. Manuscript profile

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